A person of interest has been interviewed in South San Francisco as police investigate the Saturday incident police say involved the "ambush" of an officer in the Hillsborough Police Department parking lot,

Hillsborough police on Sunday said they believe their department was the target of a shooting that injured an officer.

A Hillsborough police officer was "ambushed" by a gunman in the rear parking lot of the town's police station Saturday afternoon, but survived, officials said. The suspect, who fled the scene on foot, was still at large Saturday night. While the officer returned fire, it wasn't known whether he struck his assailant, police said.