The authorities have warned the public not to approach Christopher Dorner
Los Angeles police have launched a huge manhunt for a sacked officer who is suspected of killing three people, including a former colleague.
Christopher Dorner, 33, is alleged to have killed a policeman and wounded two others in Thursday morning shootings.
He is also wanted over the shooting deaths of a couple at the weekend.
Mr Dorner is said to have implicated himself in a “manifesto” he wrote, that made threats against several people.
The document included threats against members of the Los Angeles Police Department, authorities said.
Mr Dorner was with the police department between 2005-08, but lost his job for making false statements.
‘Armed and dangerous’
Post-mortem examinations revealed that Monica Quan, 28, and her fiance Keith Lawrence, 27, died on Sunday night from multiple gunshot wounds, Orange County sheriff’s spokesman Jim Amormino said.
They were found in their vehicle in the car park of their block of flats in Irvine, California.
Quan’s father, a retired policeman, had represented Mr Dorner before the Board of Rights, a tribunal that ruled against the suspect at the time of his dismissal, a police officer told the Associated Press.
Officials say Mr Dorner also shot at two officers in the early hours of Thursday morning in the city of Corona Riverside County, east of Los Angeles. One of the officers was grazed.
The Los Angeles Times reports that those officers had been protecting someone mentioned in the suspect’s “manifesto”.
Later, two policemen were ambushed in their patrol car at a red light in Riverside, a nearby town.
One officer was killed and the other was undergoing surgery.
Police say an LAPD badge and identification belonging to Mr Dorner have been found by a citizen near the San Diego’s airport.
The authorities have appealed to the public for help locating Mr Dorner, but warn that he should not be approached.
“We have strong cause to believe Dorner is armed and dangerous,” Irvine Police Chief David Maggard said on Wednesday night.
Chief Maggard added that the FBI were assisting with the case.
Authorities said the suspect may be driving a blue 2005 Nissan Titan pickup truck. He was last known to be living in La Palma.