- Manhunt under way for former LAPD officer after shootings involving officers
- Christopher Jordan Dorner is also wanted in a double murder Sunday in Irvine
- Dorner has threatened violence against LAPD officers, the agency says
- Police say he is "armed and extremely dangerous"
(CNN) -- A former Los Angeles police officer who has violently threatened his former colleagues shot at multiple officers early Thursday, police said, sparking a huge manhunt in Southern California.
Christopher Jordan Dorner, 33, is also accused of a double slaying Sunday in Irvine, California.
The California Highway Patrol issued an alert Thursday morning urging officers in several southern California counties to be on the lookout for Dorner after a series of overnight shootings involving police.
Irvine police identified Dorner on Wednesday as the suspect n the February 3 deaths of Keith Lawrence and Monica Quan in Irvine.
Dorner, 33, also has made violent threats against other Los Angeles police officers, the agency said Wednesday.
Los Angeles police warned people who encounter Dorner not to approach him, saying he is likely "armed and extremely dangerous."
"Our department is implementing all measures possible to ensure the safety of our LAPD personnel, their families and the Los Angeles Community, and will continue to do so until Dorner is apprehended and all threats have been abated," police said in a statement.
Dorner worked as a Los Angeles police officer from 2005 to 2008, according to Los Angeles police.
