OLD BRIDGE, N.J. – An ex-Marine wearing desert camouflage opened fire at a New Jersey supermarket early Friday, killing two of his co-workers and himself as other terrified store employees ran for cover, authorities said.

Terence Tyler, 23, left his shift at a Pathmark store in Old Bridge Township around 3:30 a.m., drove off and returned 20 minutes later to the closed store with a handgun and an assault rifle similar to an AK-47, Middlesex County Prosecutor Bruce Kaplan said. About 12 to 14 workers were still there.

He first fired outside the store at an employee, who ran inside and warned co-workers as Tyler kept firing and entered the store, Kaplan said. Tyler stopped at one of the supermarket aisles and fired at five other workers, killing 18-year-old Christina LoBrutto and a 24-year-old Bryan Breen as other workers hid, officials said.