VIDEO: 2 Officers Shot, 1 Killed at San Diego Traffic Stop

A police officer was fatally shot and another seriously injured during a traffic stop in San Diego late Thursday, officials said.

Authorities said early Friday that one person was in custody, but told residents to stay indoors while they searched the area for other potential suspects.

SWAT vehicles, helicopters and patrol cars were involved in the extensive operation.

The shooting happened at around 11 p.m. local time, San Diego Police Chief Shelley Zimmerman told reporters early Friday.

The officers — both assigned to the department's gang unit — had just pulled over a car when, almost immediately after, they called for emergency cover, Zimmerman said.

One of the officers died at the hospital after suffering multiple gunshot wounds to his upper torso. The other cop was also shot in the upper torso and rushed to surgery.

"We are hopeful that that officer will survive and make a full recovery," Zimmerman told NBC News .