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SAN DIEGO — A San Diego police gang unit officer was killed and a second was wounded in a shooting during a traffic stop in the Southcrest neighborhood, Police Chief Shelley Zimmerman said in an emotional press conference on Friday morning.

The events that led up to the shooting late Thursday night were not immediately detailed.

San Diego Police Chief Shelley Zimmerman said that shortly after the two announced they were making a stop, they requested “emergency cover” from other officers. One of the officers suffered multiple gunshot wounds to the upper body. He was rushed to the hospital in a squad car. Doctors were unable to save him, she said.

The other officer underwent surgery and is expected to survive, according to the chief.

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