A gang member paroled from jail only days ago shot and killed a Whittier police officer who was answering a report of a traffic accident and wounded his partner Monday before being wounded himself, authorities said.

The officers arrived at an intersection in the eastern Los Angeles suburb around 8 a.m., but they didn't realize a car that had struck two others at a stoplight was reported stolen, Los Angeles County sheriff's Lt. John Corina said.

One motorist pointed out the location of the car that had rear-ended his vehicle, and the officers approached the driver, Corina said at an afternoon news conference.

Keith Boyer Whittier Police Department via AP

This undated photo provided by the Whittier Police Department shows Whittier police officer Keith Boyer. On Feb. 20, 2017, Boyer was answering a report of a traffic accident when he was shot and killed, authorities said.

This undated photo provided by the Whittier Police Department shows Whittier police officer Keith Boyer. On Feb. 20, 2017, Boyer was answering a report of a traffic accident when he was shot and killed, authorities said.

(Whittier Police Department via AP)

"When they get him out of the car, they go to pat him down for weapons, they can see he's got tattoos all over his face and all over his neck," Corina said.

The man then pulled a semi-automatic handgun and opened fire at the officers, who were wearing bulletproof vests and shot back, Corina said.

Veteran Officer Keith Boyer was shot and his partner, Patrick Hazel, was wounded. Hazel and the alleged gunman were hospitalized in stable condition, Corina said.

The 26-year-old suspect is a known gang member who had been paroled about 10 days earlier, Corina said.

After the shooting, a long line of police cars escorted the slain officer's body from a hospital in Irvine to the coroner's office. Mourners placed candles and flowers outside police headquarters.

The Whittier Police Department has about 125 sworn officers who police Whittier and Santa Fe Springs in southeastern Los Angeles County.

The department has had two other officers killed in the line of duty: a detective in 1979 and a corporal in 1977.

Police officer killed Katie Falkenberg / AP

Authorities investigate the scene after a deadly shooting in Whitter, Calif., on Feb. 20, 2017. A California police officer was killed and another wounded in a shooting while they were trying to help a man who had been in a traffic accident in Whittier, officials said.

Authorities investigate the scene after a deadly shooting in Whitter, Calif., on Feb. 20, 2017. A California police officer was killed and another wounded in a shooting while they were trying to help a man who had been in a traffic accident in Whittier, officials said.

(Katie Falkenberg / AP)

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