The Marine killed during a helicopter ropes training exercise was a staff sergeant from Warrenton, Virginia.
Staff Sgt. Jonathan Lewis, 31, was with an anti-terrorism fleet security team based in the Norfolk, Virginia, area.
Col. Jeffrey Kenney said that Marines from Virginia and North Carolina were performing the training on Wednesday at Camp Lejeune when the accident occurred.
Lewis was inside the helicopter when he was killed.
Kenney says the training allows them to use rappelling and fast ropes techniques to get into difficult terrain where aircraft may not be able to land.
The Marines say two injured service members remain hospitalized Friday, while nine have been treated and released.