A surveillance camera captured the scene Sunday afternoon just before 2:00 p.m. inside the One Stop Shoppe on Eayerstown Road in Lumberton.
Investigators say the man ran into the store, pulled out a silver handgun and demanded money.
The clerk complied. The suspect made off with an undisclosed amount of cash.
Police are looking for a very thin medium- to light-skinned man, about 5'11" tall. He was wearing a hooded "Aeropostale 87" sweat shirt, red bandana, and red baseball cap with writing on the front and gloves.
He was carrying a gym bag and fled on foot headed toward the nearby Whitehall Apartments.
Anyone with information about the suspect or the crime is asked to contact the Lumberton Township Police Special Investigations Unit at 609-267-1111 ext. 121 or 609-267-8300.