Christopher Jordan Dorner allegedly shot two Riverside Police Department officers in Los Angeles around 1:30 a.m. Thursday while they were on a routine patrol. Handout

Los Angeles police are currently searching for a former LAPD officer who they believe is responsible for the shooting of three on-duty cops.

According to the Los Angeles Times, Christopher Jordan Dorner allegedly shot two Riverside Police Department officers around 1:30 a.m. Thursday while they were on a routine patrol near Magnolia and Arlington streets.

The officers were reportedly stopped at a light when they were hit but were able to radio for help.

The officers were taken to Riverside Community Hospital, where one was pronounced dead. The other was undergoing surgery and was in unknown condition.

In addition, an LAPD officer was reportedly shot and suffered a graze wound in the area of Magnolia and the 15 Freeway in Corona.

Considered armed and dangerous, Dorner, 33, is believed to be driving a black Nissan Titan pickup truck, California license plate 8D83987 or 7X09131. He may have changed the plates to elude authorities.

Dorner is also wanted for allegedly killing Cal State Fullerton assistant basketball coach Monica Quan, 28, the daughter of a former LAPD officer, and her fiancé, Keith Lawrence, 27.

The couple was found shot to death in the parking lot of their upscale apartment complex in Irvine on Sunday night.

Dorner was fired from the LAPD in 2008 for allegedly making false statements about his field training officer, who he accused of kicking a suspect. The LAPD Board of Rights found that the complaint was false and terminated his employment for making false statements. He appealed the action.

Police discovered a multipage manifesto on Dorner’s Facebook page recently about his termination.

An L.A. Times reports indicates that Dorner specifically named retired L.A. police Captain Randy Quan, the father of Monica Quan, in the online postings.

According to the manifesto, obtained by the Times, Dorner was disgruntled about that fact that Quan and others did not fairly represent him at the review hearing.

“Your lack of ethics and conspiring to wrong a just individual are over. Suppressing the truth will lead to deadly consequences for you and your family.

“There will be an element of surprise where you work, live, eat and sleep,” he wrote, referring to Quan and several others.

“I never had the opportunity to have a family of my own, I’m terminating yours,” he added.

In the document, he threatens violence against other police officers.

“The violence of action will be high. ... I will bring unconventional and asymmetrical warfare to those in LAPD uniform whether on or off duty,” Dorner wrote.

Dorner’s last known address is in La Palma. He is described as a 6-foot-tall African-American who weighs about 270 pounds and has black hair and brown eyes.