RIVERSIDE (CBSLA.com) — Authorities confirm that a burned-out truck matching the description of a getaway vehicle owned by triple-murder suspect Christopher Dorner was found in the San Bernardino mountains Thursday.

COMPLETE COVERAGE: SoCal Manhunt

Police were searching Thursday for 33-year-old Dorner, a former Los Angeles Police Department officer, after he was named a suspect Wednesday night in a double homicide in Irvine.

Authorities also say Dorner is responsible for the murder of a 34-year-old Riverside Police officer. Officials said two officers were stopped at a red light while on routine patrol around 1:35 a.m. Thursday when someone shot them.

“Two of our officers were involved in a shooting at the intersection of Arlington and Magnolia. Both officers were shot and transported to a local hospital. One was pronounced dead, the other one is currently in surgery and is in critical condition,” Officer Bryan Galbreath told KNX 1070.

Officer Bryan Galbreath

The deceased officer was an 11-year veteran of the force. The 27-year-old injured victim is expected to make a full recovery, Riverside Police Chief Sergio Diaz said in a news conference Thursday.

The suspect is believed to be involved in another officer-involved shooting that took place shortly after 1 a.m. LAPD officers from the Newton division were following the suspect’s vehicle in Corona when the shooting took place near the Magnolia Avenue exit off the northbound Interstate 15.

“The suspect was out of his vehicle immediately with a shoulder weapon and started to shoot at the officers. The officers took cover, returned fire, both officers. One of our officers was grazed during that incident. The other officer is uninjured,” an LAPD spokesperson said. “He was treated here at the scene and released at the scene.”

Dorner is also suspected in the murders of Monica Quan, 28, and her 27-year-old fiancé Keith Lawrence on Feb. 3.

The couple was found fatally shot inside Lawrence’s Kia in the parking garage of their Irvine condo complex.

Authorities believe Dorner, a former U.S. Navy reservist, targeted the daughter of Capt. Randy Quan, in what police are calling a revenge killing.

Quan, who is now a retired LAPD officer, represented Dorner in a case that ultimately led to his termination for making false statements against another officer in 2008. He was hired by LAPD in early 2005.

KNX 1070’s Claudia Peschiutta reports the suspect posted a 20-page manifesto on Facebook saying, “I never had the opportunity to have a family of my own, I’m terminating yours.”