Police in Montgomery County are investigating an armed robbery.

The holdup happened at a Gulf gas station at 615 E. High St. in Pottstown just before 10 p.m. Tuesday.

Officials said one man, armed with a gun, held up the clerk and took a money bag. He was last seen running to the back of the store.

Several departments assisted in the search for the robber, but so far no arrests have been made.