THREE men in a black Kia Soul wagon used a handgun and a sledgehammer to rob the 7-eleven store in Cranbourne Rd, Frankston, 5.20am, Sunday 3 July.
Two men entered the store with the weapons, Detective Sergeant Al Hanson, of Frankston CIU, said, while the driver waited outside.
The man with the handgun approached the counter, pointed it directly at the attendant and demanded money. The second man then smashed the glass counter top with the sledgehammer and demanded cigarettes.
The attendant handed over cash and cigarettes and the men ran outside, jumped in the car, and were driven away.
Anyone who has information is urged to call Detective Hanson, 9784 5590.