- NEW: Crash may be linked to train going too fast, transport minister tells radio station
- Regional governor declares 7 days of mourning for the victims
- Witness: "The train was broken in half. ... It was quite shocking"
- 77 people are dead, more bodies may be found, regional judicial official says
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Madrid (CNN) -- An express train derailed as it hurtled around a curve in northwestern Spain on Wednesday, killing at least 77 people and injuring more than 100, officials said.
At least 73 people died at the scene, and four others died while hospitalized, said María Pardo Ríos, a spokeswoman for the Galicia regional supreme court. In Spain, judges typically record deaths that take place outside of hospitals.
Judicial teams are still at the crash site and expect to find more bodies, she told CNN on Thursday morning. There is no word yet on the nationalities of those killed.
More than 20 victims remained in critical condition early Thursday, said Agustin Hernandez Fernandez of the Galicia infrastructure ministry.
Flames burst out of one train car as another car was snapped in half after the crash. Rescue crews and fellow passengers pulled bodies through broken windows and pried open doors as stunned survivors looked on.
Deadly train crash in Spain
Deadly train crash in Spain
Deadly train crash in Spain
Deadly train crash in Spain
Deadly train crash in Spain
Deadly train crash in Spain
Deadly train crash in Spain
Deadly train crash in Spain
Deadly train crash in Spain
Deadly train crash in Spain
Deadly train crash in Spain
Deadly train crash in Spain
Deadly train crash in Spain
Deadly train crash in Spain
Deadly train crash in Spain
Deadly train crash in Spain
Deadly train crash in Spain
Deadly train crash in Spain
Deadly train crash in Spain
Deadly train crash in Spain
Deadly train crash in Spain
Deadly train crash in Spain
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The state railway, Renfe, said the train crashed on a curve several kilometers from the train station in the city of Santiago de Compostela.
The train had 218 passengers aboard and was nearing the end of a six-hour trip from Madrid to the town of Ferrol in northwest Spain when it derailed at 8:41 p.m., Wednesday, the railway said.
It was unclear how fast the train was traveling when it crashed. It was capable of going up to 250 kilometers per hour (155 mph), said Julio Hermida, a spokesman for the state railway.
Investigations into the cause of the crash continue, but suggestions that the train was traveling too fast appear to be gaining weight.
The train driver, who suffered minor injuries, told police he had entered the bend too fast, Spain's public service TV network TVE reported.
Rafael Catala, secretary of state for Transport and Housing, told Spanish radio network Cadena SER that the "tragedy appears to be linked to the train going too fast," but that the reasons for that are not yet known.
Alberto Nunez Feijoo, head of the regional government in Galicia, declared seven days of mourning for victims of the tragedy.
Spanish Prime Minister Mariano Rajoy viewed the scene of devastation Thursday morning. He was also expected to visit the injured in hospital, TVE said.
Rajoy, who is from the area, told a news conference there was a "huge challenge" ahead, not least in identifying all those killed and informing their families.
Two investigations are under way, he said.
The prime minister came under fire in Spanish media after a condolences message for the train crash victims posted by his office late Wednesday included a paragraph apparently "copied and pasted" from a statement previously sent to victims of an earthquake in Gansu, China.
''I would like to express my deepest condolences for the loss of human lives and the material damages the earthquake that has occurred in Gansu has caused," the note said.
Thunderous bang
A passenger who got off at the last stop before the train derailed told the broadcaster it was packed with people at the time.
Residents who lived near the tracks told the Voz de Galicia newspaper that they heard a thunderous bang when the train crashed. Many of them rushed to the area with blankets and bottled water for the injured, the newspaper reported.
"The train had broken in half. Some pieces were on top, some pieces were on the bottom," said Ivette Rubiera Cabrera of Florida, who caught a glimpse of the wreckage while on a family vacation in Spain and sent photos to CNN's iReport.
"It was quite shocking," she said. "We had never seen anything like that. We had just been on the train last week."
Oscar Mateos told Spain's El Pais newspaper that he saw fellow passengers thrown to the floor, then tossed from one side of the train to the other.
"Help came in five minutes, but that time became an eternity," he said. "I helped people get out with broken legs and many bruises."
Alen Perez, 16, said he had been walking nearby and saw passengers helping each other out of the train.
Emergency vehicles swarmed the scene. There were several bodies on the ground, he said.
Photos he took of the crash site showed mangled pieces of a train car and black smoke billowing out of the wreckage.
A call for blood donations
Investigators are looking at all possible causes of the crash, a senior aide to the prime minister said Wednesday. Their initial assessment indicates it probably wasn't an act of terrorism.
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Renfe's spokesman said he did not know how many crew members were aboard the train when it crashed. Normally there would be at least five crew members on a train like that, he said.
Firefighters, police and psychologists were at the scene, the Galicia government said in a statement. In Twitter posts, officials said blood donations were needed as a result of the crash.
Spain's train infrastructure authority said it was investigating.
The crash occurred shortly before a large annual celebration was set to start in Santiago de Compostela, a popular tourist destination. Local officials canceled festivities planned for Wednesday night and Thursday.
UK Foreign Secretary William Hague said his thoughts were with the victims and their families. One British citizen was injured in the accident, he said.
CNN's Al Goodman reported from Madrid. CNN's Elwyn Lopez and Catherine E. Shoichet reported from Atlanta. CNN's Laura Smith-Spark, Patrick Sung, Nelson Quinones, Marysabel Huston-Crespo and David Valenzuela contributed to this report.
