CAMP PENDLETON, Calif. – Three Marines, including one from Maine, were killed when a 5-ton truck rolled over during a night artillery exercise, a base spokesman said Thursday.

Four other marines and a Navy corpsman were injured.

Killed were Cpl. Cpl. Aaron M. Pinnetti, 19, of Bristol, Maine; Daniel L. Hudson, 21, of Bolingbrook, Ill.; and Cpl. Benjamin H. Worchel, 21, of San Antonio, Texas.

The canvas-topped truck rolled over at 5:50 p.m. Wednesday during an exercise in which an artillery unit was practicing firing and moving from one location to another, Maj. Curtis Hill told a press conference.