The San Francisco Chronicle reported Saturday that officers with the California Highway Patrol told the armed man to drop the weapon before opening fire on him.
The shooting happened Friday afternoon on Highway 101 in San Mateo, south of San Francisco. It's unclear if the armed man fired on officers.
Authorities say the officers responded to reports of a collision.
They say that upon arriving, they found the unidentified man armed with a handgun, trying to carjack a 55-year-old woman's vehicle.
The Highway Patrol says in a statement that officers shot the suspect out of a fear for themselves and the safety of others around them in heavy rush-hour traffic.
CHP Officer Art Montiel says the shooting involving three officers happened at about 5:30 p.m. Friday on the shoulder of the freeway in San Mateo near State Highway 92, shutting down all northbound lanes during the evening commute.
Montiel says the suspect, who had a handgun, was pronounced dead at the scene. He did not say whether the man had fired the gun.
No further details were released.
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