- NEW: Russia asked the FBI to look into the activities of Tamerlan Tsarnaev, an official says
- Police say they have no more suspects
- Boston sports teams are raising money for the victims
- The motive for the attacks remains unclear
(CNN) -- With one suspect in the Boston Marathon bombings dead and the other in custody, authorities on Saturday turned their attention to questions about a possible motive in the attack and whether the brothers had help in their alleged plot.
Authorities believe at least some of the answers rest with Dzhokhar Tsarnaev, who was captured Friday night after a shootout just minutes after authorities had indicated that a massive manhunt for the 19-year-old suspect appeared to come up empty.
Federal prosecutors are at the heavily guarded Beth Israel Deaconess Medical Center, where Tsarnaev is in serious condition and being treated for wounds presumably received in a shootout with police.
Authorities have not said whether they have questioned Tsarnaev, nor have they publicly said what charges will be filed against the teen. But a Justice Department official, speaking on condition of anonymity, told CNN the teen will face federal terrorism charges and possibly state murder charges.
The government has invoked the public safety exception, a designation that allows investigators to question the teen without reading him his Miranda rights and without a lawyer present, another Justice Department official, also speaking on condition of anonymity, told CNN.
Tsarnaev and his older brother, 26-year-old Tamerlan Tsarnaev, are accused of setting off two bombs near the finish line of the Boston Marathon on Monday, killing three people and leaving more than 170 wounded.
The arrest of Tsarnaev brought to an end a massive manhunt that paralyzed Cambridge, Watertown and Boston as authorities searched for a suspect not only believed to be behind the bombings, but who they feared also could unleash more explosives.
Suspect curled up on a blood-stained boat
Duffy: My stepfather is a real hero
The long night of terror comes to an end
How authorities caught bombing suspect
Boston suspect not given Miranda warning
The dramatic end to the manhunt came when a Watertown man, cooped up in his house all day because of a "shelter in place" order, finally stepped outside when the order was lifted.
David Henneberry soon noticed the tarp covering the boat in his backyard was flapping in the wind and a retention strap was cut. He also noticed a small amount of blood on the tarp.
"He basically stuck his head under the tarp, noticed a pool of blood,"
Henneberry's stepson Robert Duffy told CNN.
Henneberry discovered a man curled up in a ball.
"And at that point he became an absolute hero. Instead of being a hero at the moment and yelling at what we now know was the suspect, he did the right thing as law enforcement had urged" and called 911, Duffy said.
Authorities arrived and evacuated Duffy's stepfather. Using a bullhorn, they called out to the suspect: "Come out with your hands up."
The bloodied man refused.
"We used a robot to pull the tarp off the boat," David Procopio of the Massachusetts State Police said. "We were also watching him with a thermal imaging camera in our helicopter. He was weakened by blood loss -- injured last night, most likely." A thermal image photograph, released Saturday by the state police, showed what authorities say was Tsarnaev lying in the middle of the boat.
A gunfight ensued, with more than 20 rounds fired.
Authorities eventually rushed the boat and took the teen into custody.
24 hours of chaos
Shortly after the FBI released photos of the suspects Thursday night, Tsarnaev and his older brother, Tamerlan Tsarnaev, led authorities on a whirlwind manhunt.
Officials say the brothers, for no obvious reason, killed Massachusetts Institute of Technology police officer Sean Collier while he was sitting in his car. The Tsarnaevs then hijacked a vehicle, telling the driver they were the marathon bombers, and hurled explosives at the pursuing officers, authorities said.
"There was an exchange of over 200 rounds of gunfire, there were improvised explosive devices, and handmade hand grenades thrown at the officers at the scene," Boston Police Commissioner Ed Davis said. "This is the stuff that in an urban police department, it's almost unheard of."
Tamerlan Tsarnaev died in a shootout. He was wearing explosives and a triggering device when he died, a source briefed on the investigation told CNN.
Over the course of Friday, the Boston area virtually shut down as federal, state and local authorities went door to door searching for Dzhokar Tsarnaev.
The FBI, while executing a search warrant at a residence believed to have been affiliated with Tsarnaev, took three people into custody for questioning Friday. It was unclear Saturday what information the FBI was seeking and whether the three were released.
Spontaneous parades
The collective mood in the region turned from fear to cheers Friday night after Boston police sent out one tweet: "The hunt is over. The search is done. The terror is over. And justice has won. Suspect in custody."
Hundreds of people pour onto Hemingway Street in the Fenway neighborhood to celebrate after the announcement that the second Boston Marathon bombing suspect had been captured on Friday, April 19. The arrest of suspect Dzhokar Tsarnaev followed a massive manhunt less than a week after two bombs exploded near the finish line, shocking the nation and leaving the city on edge.
Officers from the Department of Alcohol, Tobacco, Firearms and Explosives relax Friday after the capture in Watertown, Massachusetts.
Women cheer police as they exit Franklin Street on Friday, April 19, in Watertown, Massachusetts.
A woman gives a Boston police officer a hug and other officers are thanked during a celebration in the Boston Common on April 19.
A member of the North Metro SWAT team pumps his fist while leaving the scene near Franklin Street on April 19.
Around 200 people celebrate on Hemingway Street in the Fenway neighborhood after the capture of the second suspect on April 19.
People wave U.S. flags as police drive down the street on April 19.
A photograph of Martin Richard, one of the victims of the Boston Marathon bombing, was placed on the plexiglass by a fan following the hockey game between the Buffalo Sabres and the New York Rangers on April 19 at the First Niagara Center in Buffalo, New York.
A man waves a U.S. flag in Watertown on April 19.
Local residents cheer to news that police have captured the surviving suspect Watertown on April 19.
President Barack Obama arrives in the White House briefing room to make a statement late April 19 about the capture of Dzhokhar Tsarnaev. "We've closed an important chapter in this tragedy," he said.
A SWAT team member is followed by reporters and a celebrating crowd on April 19 after the successful operation.
A police officer adjusts his hat while various law enforcement agencies descend on the area around Franklin Street on April 19.
Spectators celebrate as law enforcement officers leave the scene on April 19 near Franklin Street.
People gather at the scene near Franklin Street in Watertown on April 19.
A man claps next to a police vehicle in the Watertown neighborhood on April 19.
Onlookers applaud first responders departing the scene at the end of the manhunt on April 19.
Police officers and SWAT team members exult after the successful operation to capture suspect Dzhokhar Tsarnaev on April 19.
Boston SWAT team members are surrounded by spectators and the media on April 19.
Residents clap after the capture of the second of two suspects wanted in the Boston Marathon bombings on April 19.
Boston celebrates, seeks return to normal
Boston celebrates, seeks return to normal
Boston celebrates, seeks return to normal
Boston celebrates, seeks return to normal
Boston celebrates, seeks return to normal
Boston celebrates, seeks return to normal
Boston celebrates, seeks return to normal
Boston celebrates, seeks return to normal
Boston celebrates, seeks return to normal
Boston celebrates, seeks return to normal
Boston celebrates, seeks return to normal
Boston celebrates, seeks return to normal
Boston celebrates, seeks return to normal
Boston celebrates, seeks return to normal
Boston celebrates, seeks return to normal
Boston celebrates, seeks return to normal
Boston celebrates, seeks return to normal
Boston celebrates, seeks return to normal
Boston celebrates, seeks return to normal
Boston celebrates, seeks return to normal
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Photos: Boston celebrates
Authorities have named Dzhokar Tsarnaev, 19, of Cambridge, Massachusetts, as a suspect in the Boston Marathon bombings. He was arrested on Friday, April 19, after a massive manhunt following an overnight shootout with police in suburban Watertown that left his 26-year-old brother Tamerlan Tsarnaev -- the other man wanted in the bombings -- dead.
An image posted to the social sharing website Reddit purports to show suspect Dzhokar Tsarnaev being detained by law enforcement officers.
Tsarnaev was caught on a convenience store surveillance camera video that was released by Boston Police Department on April 19.
The FBI released footage of the two men it called suspects in the deadly bombings and pleaded for public help in identifying them on Thursday, April 18. They were photographed walking together near the finish line of the marathon before the explosions that killed three people and wounded about 180.
Additional photos and video of the two men were released by the FBI on April 19.
A picture of Tsarnaev seen on his apparent profile on VKontakte, a Russian social network similar to Facebook.
The Boston Police Department released this undated photograph of the suspect on April 19.
Suspect 2: Dzhokar Tsarnaev
Suspect 2: Dzhokar Tsarnaev
Suspect 2: Dzhokar Tsarnaev
Suspect 2: Dzhokar Tsarnaev
Suspect 2: Dzhokar Tsarnaev
Suspect 2: Dzhokar Tsarnaev
Suspect 2: Dzhokar Tsarnaev
Suspect 2: Dzhokar Tsarnaev
An officer carries a child away from an area where a suspect was hiding on Franklin Street on Friday, April 19, in Watertown, Massachusetts. After a car chase and shootout with police, one suspect in the Boston Marathon bombing, Tamerlan Tsarnaev, was shot and killed by police early Friday, and his brother and second suspect, Dzhokhar Tsarnaev, was taken into custody Friday night. The two men are suspects in the bombings at the Boston Marathon on April 15, that killed three people and wounded at least 170.
Residents flee from an area where a suspect was hiding on Franklin Street on April 19.
Officers approach an area where a suspect was hiding on April 19.
People react while watching police respond to reported gunfire on April 19.
An ambulance carries Boston Marathon bombing suspect Dzhokhar Tsarnaev, 19, from the scene after he was apprehended in Watertown, Massachusetts, on April 19.
An image posted to the social sharing website Reddit purports to show suspect Dzhokar Tsarnaev being detained by law enforcement officers.
Dzhokar Tsarnaev gets out of the boat he was hiding in outside of a home in Watertown, as seen in a surveillance video still.
Special imaging techniques employed by Massachusetts State Police reveal Boston Marathon bombing suspect Dzhokar Tsarnaev hiding in a boat in a backyard in Watertown on April 19.
Police SWAT teams leave the area after apprehending the suspect in a yard where he was hiding in a dry-docked boat on April 19.
Members of a police SWAT team run to the scene where the suspect was hiding on April 19.
Police converge near the scene where the bombing suspect was hiding.
SWAT team members run toward a police assault on a house as gunfire erupts on April 19.
Family members react after police SWAT teams assaulted a house on their street on April 19.
Police officers search house to house for the second suspect in a neighborhood of Watertown, Massachusetts, on Friday.
Members of a family who fled the scene near where the suspect was hiding talk with the authorities on Friday.
Law enforcement officials evacuate people away from the area where the suspect was hiding.
Police move in to the area where the suspect was hiding on Friday in Watertown, Massachusetts.
SWAT team members move down residential streets as they perform door-to-door searches in Watertown, Massachusetts, on April 19.
SWAT team members talk with Watertown, Massachusetts, residents while conducting door-to-door searches on April 19.
A Watertown police vehicle with bullet holes in its body and a shattered windshield is towed out of the search area on April 19 in Watertown, Massachusetts.
SWAT teams prepare to enter a home as they continue the door-to-door search.
SWAT teams continue the ongoing manhunt in Watertown, Massachusetts.
A man watches from the window of a home as a SWAT team member keeps watch on Friday, in Watertown, Massachusetts.
Flags decorate the fence along the length of Dorchester Avenue that runs over the sparsely traveled expressway in South Boston as a memorial to the victims of the Boston Marathon bombings.
Beacon Street across from the Boston Common was nearly vacant of vehicle traffic at 10:45 a.m. as the manhunt for the second suspect took place.
An entrance into Fenway Park is closed after the April 19 game between the Kansas City Royals and Boston Red Sox was posptoned.
Police to continue to the door-to-door search on Francis Street in Watertown, Massachusetts, on Friday.
Max Jaffe, a Tufts University student, who lives across the street from slain MIT police officer Sean Collier, looks on from his home on Friday.
SWAT team members line a residential street in Watertown, Massachusetts, as the manhunt continues on Friday.
U.S. President Barack Obama meets with members of his national security team in the Situation Room of the White House on April 19 to discuss developments in the Boston bombings investigation.
A Police SWAT team prepares to make a house-to-house search as residents leave their homes in Watertown, Massachusetts, on April 19.
Law enforcement officers place themselves in an overhead position on Arsenal Street as the search continues on April 19.
Law enforcement officers react to what was initially thought to be a threatening suspect on Arsenal Street on April 19.
Armed Boston Maritime Safety Security team members patrol the Boston Harbor on April 19.
A SWAT team member talks with a resident on April 19 during a house-to-house search.
Anzor Tsarnayev, father of the two suspects, who is currently living in Russia, maintains that his sons are innocent. "Someone framed them," he told the Russian national TV network Zvezda in Dagestan. "I don't know who exactly did it. But someone did. And being cowards, they shot the boy dead. There are cops like this."
The Cape Cod, Massachusetts, Police Department SWAT team participates in the search of houses in Watertown, Massachusetts, on April 19.
A police SWAT team searches houses on April 19 for the second suspect.
SWAT team members continue to search neighborhoods in Watertown on April 19.
SWAT teams searches homes along Winsor Avenue in Watertown on April 19.
A U.S. military helicopter lands behind Watertown Mall as law enforcement agencies continue to search for the 19-year-old bombing suspect on Friday.
A Massachusetts state trooper watches other troopers line up at Watertown Mall as the manhunt for the second suspect continues in Watertown on Friday.
Katia Costa looks out her window as police continue the manhunt on Nichols Avenue in Watertown on Friday.
Police continue the ongoing manhunt for the second suspect on Williow Avenue in Watertown on Friday.
Law enforcement officers search a Watertown neighborhood on Friday.
Watertown residents watch members of law enforcement agencies search their neighborhood for the remaining suspect on Friday.
Ruslan Tsarni, uncle of the Boston terror suspects, told CNN affiliate WBZ that Tamerlan "got what he deserved" in an interview outside his home in Montgomery Village, Maryland, on Friday.
Officers from several agencies search an apartment complex in Watertown on Friday.
Cambridge, Massachusetts, residents look out as law enforcement searches the area on Friday.
Law enforcement officers search an apartment complex as residents are evacuated in Watertown on Friday.
Officers coordinate a search of an apartment complex in Watertown on Friday.
SWAT teams move into position at the intersection of Nichols and Melendy avenues in Watertown, Massachusetts, on Friday.
SWAT teams gather at the intersection of Nichols and Melendy avenues in Watertown while searching for the remaining suspect on Friday.
Residents are evacuated as members of the FBI, state police, Boston Police, Cambridge Police and other law enforcement agencies survey the perimeter near the home of the man identified as Suspect 2 on Norfolk Street on Friday, April 19 in Cambridge, Massachusetts.
A state police officer stands ready as the search for the second suspect takes place on Mount Auburn Street near Watertown Square in Watertown, Massachusetts, on Friday.
SWAT officers search an apartment for the remaining suspect in the Boston Marathon bombings in Watertown on Friday, April 19. A resident reported seeing drops of blood in the apartment building.
A member of the SWAT team trains a gun on an apartment building on Friday during the search for the second suspect.
A woman is questioned by Cambridge police and other law enforcement agencies Friday near the home of the second suspect in Cambridge, Massachusetts. A Massachusetts Institute of Technology campus police officer was shot and killed late Thursday night at the school's campus in Cambridge. A short time later, police reported exchanging gunfire with alleged carjackers in nearby Watertown.
Members of the FBI, state police, Boston Police, Cambridge police and other law enforcement agencies put up tape in front of a woman being questioned near the home of the second suspect in Cambridge, Massachusetts, on Friday.
A resident watches as police search an apartment complex in Watertown on Friday.
A Massachusetts State Police officer checks the bag of a cyclist amid heightened security on Friday in Watertown.
A man looks out as a SWAT team member knocks on his neighbors' door in Watertown, Massachusetts, on Friday.
Police search for the second suspect at an apartment building where a resident reported finding drops of blood on Friday in Watertown, Massachusetts.
SWAT team members search in Watertown on Friday for the surviving Boston Marathon bombing suspect.
SWAT team members search for the suspect at a residential building on Friday in Watertown.
Onlookers take pictures while SWAT team members look around on Friday.
Massachusetts Gov. Deval Patrick, left, speaks to the media at a shopping mall on the perimeter of a locked-down area during the search on Friday.
SWAT officers check a door with guns ready on Friday.
An FBI SWAT team surrounds a home while following a tracking dog in Watertown on Friday.
Metro SWAT members hang off the back of a truck during the search on Friday.
Military police arrive in armored vehicles at the parking lot of the Arsenal Mall on Friday in Watertown.
Two police officers stand guard at the perimeter of a locked-down area as the search continues on Friday.
Police officers wait in front of the shopping mall on Friday.
Officers patrol Watertown on Friday.
The aftermath of the shootout that police said involved the two suspects in Watertown early Friday.
Police with guns drawn search for a suspect on Friday in Watertown, Massachusetts.
A police officer runs with his gun drawn on Friday.
Police descend on School and Walnut streets on Friday.
Boston Police gather in the parking lot in front of a Best Buy store near the Watertown Mall on Friday.
Boston Police Commissioner Edward Davis speaks during a media briefing in the parking lot of the Watertown Mall on Friday.
Boston police gather in front of a Best Buy on Friday.
Police stop cars at School and Walnut streets on Friday.
A police officer and his dog patrol School and Walnut streets on Friday.
A Massachusetts state trooper checks a building along Mount Auburn Street as police search neighborhoods in Watertown.
Police search neighborhoods yard by yard on Friday.
Police with guns drawn search for a suspect on Friday.
Police convene on School and Walnut streets on Friday.
School and Walnut streets had a heavy police presence overnight.
A police officer talks to a driver at a checkpoint in Watertown, Massachusetts.
Police officers keep a man on the ground in Watertown on Friday.
Police investigate the scene where the MIT campus police officer was shot and killed on the night of Thursday, April 18, in Cambridge, Massachusetts.
Manhunt for Boston bombers
Manhunt for Boston bombers
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Photos: Manhunt for Boston bombers
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Photos: Manhunt for Boston bombers
Photos: Manhunt for Boston bombers
Photos: Manhunt for Boston bombers
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Photos: Manhunt for Boston bombers
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Photos: Manhunt for Boston bombers
Photos: Manhunt for Boston bombers
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Photos: Manhunt for Boston bombers
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Photos: Manhunt for Boston bombers
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Photos: Manhunt for Boston bombers
Summer Street in downtown Boston is empty as authorities hunt for the surviving marathon bombing suspect on Friday, April 19. Much of the Boston area was closed or in lockdown during the investigation and residents were asked to stay inside.
A man crosses a vacant Beacon Street across from the Boston Common on April 19.
Federal Street is mostly empty on April 19 in the Financial District.
The Boston Red Sox postponed a game with the Kansas City Royals scheduled for April 19 because of the manhunt.
Moody Street in Waltham is deserted as the lockdown continues on April 19.
Congress Street in Boston appears mostly empty on April 19, looking toward Post Office Square.
Beacon Street, with a view toward the Massachusetts State House, has no pedestrians and little vehicular traffic on April 19.
The area near Boston's Downtown Crossing would usually be filled with lunchtime crowds.
The Boston Public Garden is largely empty on April 19.
Congress Street at Milk Street is deserted during the lunchtime hour on April 19.
Paths are empty at the Boston Public Garden on April 19.
The area around the North Station next to the TD Garden is deserted April 19 with public transportation shut down in the Boston area.
Only a few pedestrians cross the Harvard Bridge, known locally as the Massachusetts Avenue Bridge, on April 19.
A lone bicyclist makes his way across the Longfellow Bridge to Boston from Cambridge on April 19.
Watertown Square is deserted at about 6 a.m. April 19 as the manhunt intensifies.
With public transportation suspended, Friend Street near North Station is empty.
A flower sits near the site where an MIT police officer was killed in Cambridge. Police say they think the bombing suspects were responsible for the shooting on Thursday night, April 18.
Ceasar McDowell, an urban studies professor at MIT, says he went for a walk Friday on Massachusetts Avenue in Cambridge, only to find everything closed except for a CVS drugstore and a Dunkin' Donuts. "I don't know how to describe it," said McDowell, a CNN iReporter. "(I)t was eerie that quietness."
Traffic appears nonexistent on Massachusetts Avenue in Cambridge.
The area around North Station had few people around 9:40 a.m. on April 19.
The usually bustling Boston University campus is vacant on April 19.
The day Boston became a ghost town
The day Boston became a ghost town
The day Boston became a ghost town
The day Boston became a ghost town
The day Boston became a ghost town
The day Boston became a ghost town
The day Boston became a ghost town
The day Boston became a ghost town
The day Boston became a ghost town
The day Boston became a ghost town
The day Boston became a ghost town
The day Boston became a ghost town
The day Boston became a ghost town
The day Boston became a ghost town
The day Boston became a ghost town
The day Boston became a ghost town
The day Boston became a ghost town
The day Boston became a ghost town
The day Boston became a ghost town
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The day Boston became a ghost town
As local and federal authorities left their positions late Friday night, hundreds of residents swarmed the streets of Watertown and Boston, surrounding the cars and cheering them on.
"Every time a police car passed by, the cheering became louder, and a sense of respect and admiration was felt through the crowd," said Montana Fredrick, who joined a sea of other Northeastern University students in greeting the officers.
"I feel relieved, and I feel like everybody else is relieved," Berklee College of Music student Myles Marcus said. "I feel like I can go back to school now and know that I'm safe."
While many officers remained stoic, members of the Boston SWAT team responded to the crowds: "Thank you. Thank you. It was our pleasure," the team said over a loudspeaker.
Still mourning
But the celebrations were tempered by the deaths of four people this week, all allegedly by the hands of the Tsarnaev brothers.
Three spectators were killed in the marathon bombings and
Collier, the MIT police officer, was fatally shot early Friday. At least 58 people remained hospitalized late Friday night, including three in critical condition, according to a CNN count.
Mistaken identity adds to family's grief over Boston victim
The family of
8-year-old Martin Richard, who was killed in the bombings, issued a statement thanking the authorities and members of the public who helped track down the two suspects.
"It worked, and tonight, our community is once again safe from these two men," the Richard family said.
"None of this will bring our beloved Martin back, or reverse the injuries these men inflicted on our family and nearly two hundred others. We continue to pray for healing and for comfort on the long road that lies ahead for every victim and their loved ones."
Boston sports teams Saturday were honoring the victims of the attacks.
The Boston Red Sox planned a special pre-game ceremony at their Saturday game against the Kansas City Royals, which was being played amid heightened security at Fenway Park. Their Friday night game against the Royals was postponed because of the city lockdown and will be played Sunday, the team said, for a day-night double-header.
The Boston Bruins hockey game against the Pittsburgh Penguins, originally scheduled for Friday night, was rescheduled for Saturday afternoon.
The Bruins and Penguins, along with the Red Sox, all plan to auction their Saturday jerseys to support the bombing victims.
Limited-edition T-shirts reading "Boston Stands as One" are being sold by the Boston Celtics to support the victims. Players planned to wear some of the shirts while warming up for Saturday's game, the team said.
Chinese student killed in bombings had followed her passion to Boston
Obama and Republicans stand together
President Barack Obama united with Republicans on Saturday in condemning the violence that took place in Boston and praising the valor that followed.
In his weekly radio address, Obama argued the deadly Boston Marathon bombings, which he described as an "act of terror," will not be remembered for the damage it caused but the "stories of heroism and kindness."
In the Republicans' address, Sen. Tim Scott, like Obama, praised first responders and cautioned those who would consider attacking the United States.
"There is no corner on Earth, no hiding place in America that will keep us from finding you," he said.
Scott said the United States "will do everything in our power to bring justice for the families and the communities impacted. Our freedom is our most precious possession. Any effort to take it away will only strengthen our determination.
'Seek forgiveness'
What's next for the Boston Marathon bombing suspect?
Tsarnaev's uncle Ruslan Tsarni said their alleged actions were abhorrent.
"
You put a shame on our entire family -- the Tsarnaev family -- and you put a shame on the entire Chechen ethnicity," Tsarni said.
Tsarnipromised Saturday to help his nephew seek forgiveness from the bombing victims and advised him to tell police everything he knows.
The brothers come from a family originally from the Russian republic of Chechnya and fled the brutal wars there in the 1990s.
It's unknown how their Chechen roots may have influenced their alleged actions.
Tsarni said he believes Tamerlan Tsarnaev influenced his younger brother.
FBI agents interviewed the elder Tsarnaev in 2011 at the request of a foreign government that suspected he had ties to extremist groups, the FBI said. It declined to name the government, but a senior U.S. official told CNN on Saturday that it was Russia that made the request of the United States.
The request was based on information that Tamerlan Tsarnaev was a follower of radical Islam, the FBI said, adding it found no evidence of terrorism activity.
"I think unless we see some horrible dropping of the ball, I don't think this is an intelligence failure," said former CIA operative Robert Baer. "In retrospect, it might look like one, but I don't think it is."
The suspects' father, who lives in the Russian republic of Dagestan, told CNN on Saturday that he believes his sons were "never, ever" involved in the Boston attacks. He also said he plans to go to the United States, though he didn't say when.
CNN's Melissa Gray, Carol Cratty, Susan Candiotti, John King, Joe Johns, Chris Lawrence, Deborah Feyerick, Jake Tapper, Drew Griffin, Poppy Harlow, Shannon Travis, Pamela Brown, Julian Cummings, and Nick Paton Walsh contributed to this report.