Around 7:08 p.m., Ambridge police report that a man walked into the gas station and to the back of the store, where he surprised a clerk coming out of a back office.
The clerk suffered some chest discomfort but refused treatment.
The robbery suspect is described as a white male between 5-feet-5-inches and 5-feet-7-inches with a thinner build, wearing a heavy brown coat with a fur-lined collar. He also had a black hooded sweatshirt with white lettering and was wearing grey sweatpants.
Anyone with information should call Ambridge Police at 724-266-5977.