A Marine trainee at the service’s infantry school at Camp Pendleton, Calif., died Thursday during a nighttime live-fire exercise, a service spokesman said.

The incident was under investigation on Friday, Maj. Joshua Pena, a spokesman for Marine Corps Training and Education Command, said in a brief statement. The Marine who died has not been named yet. The military typically waits at least 24 hours after family of the deceased service member is notified before publicly releasing the name.

“The command is fully cooperating with the investigation efforts,” Pena said. He added the School of Infantry-West was “providing support to the family and peers of the deceased during this difficult time.”

Pena said additional information about the incident, including what led to the Marines’ death, was part of the ongoing probe and not immediately available.

The Marine Corps’ School of Infantry-West houses one of the service’s two training courses for new Marines entering the infantry out of recruit training. The West Coast school at Camp Pendleton typically trains Marines bound for the infantry after they complete initial recruit training at the service’s Recruit Depot San Diego. Infantry Marines who graduate from Recruit Depot Parris Island, S.C., typically train for their job at the service’s School of Infantry-East at Camp Lejeune, N.C.

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