Authorities have identified the four U.S. Marines who were killed during a NATO cold response training exercise in Norway on Friday.

The U.S. Marines Corps identified the deceased as Capt. Matthew J. Tomkiewicz of Fort Wayne, Indiana, Capt. Ross A. Reynolds of Leominster, Massachusetts, Gunnery Sgt. James W. Speedy of Cambridge, Ohio, and Cpl. Jacob M. Moore of Catlettsburg, Kentucky. The men, who were based out of North Carolina, crashed their MV-22 Osprey on Friday after navigating rough terrain in poor weather conditions. They ranged in age from 24 to 30.