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

A search is underway in Hillsborough for a suspect after police said an officer was shot in the police department's parking lot Saturday evening.

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.