WASHINGTON (AP) — The U.S. Marine Corps has identified the four Marines who died when their Osprey aircraft crashed Friday night in a Norwegian town in the Arctic Circle during a NATO exercise.

All four were assigned to Marine Medium Tiltrotor Squadron 261, Marine Aircraft Group 26, 2d Marine Aircraft Wing stationed on Marine Corps Air Station New River, North Carolina.

They are Capt. Matthew J. Tomkiewicz, 27, of Fort Wayne, Indiana; Capt. Ross A. Reynolds, 27, of Leominster, Massachusetts; Gunnery Sgt. James W. Speedy, 30, of Cambridge, Ohio; and Cpl. Jacob M. Moore, 24, of Catlettsburg, Kentucky.

The cause of the crash remains under investigation.