Shippensburg Borough Police are investigating a robbery in which a white man displayed a knife at the Sunoco, 92 W. King St., about 9:30 p.m. Sunday.
Police said the man took an undisclosed amount of cash then fled to a nearby waiting vehicle. The vehicle is described as a light-colored Chevrolet Trailblazer or similar type vehicle.
There were no injuries in the incident.
Police ask anyone with information to contact them at 717-532-7361.