(CNN) -- Four NATO service members killed over the weekend in a plane crash in southern Afghanistan were Americans.
The MC-12 crashed Saturday.
The cause of the crash is under investigation but there was apparently no enemy activity in the area.
Capt. Brandon L. Cyr, 28, of Woodbridge, Virginia. He was assigned to the 906th Air Refueling Squadron, Scott Air Force Base, Illinois.
Capt. Reid K. Nishizuka, 30, of Kailua, Hawaii. He was assigned to the 427th Reconnaissance Squadron, Beale Air Force Base, California.
Staff Sgt. Richard A. Dickson, 24, of Rancho Cordova, California. He was assigned to the 306th Intelligence Squadron, Beale Air Force Base, California.
Staff Sgt. Daniel N. Fannin, 30, of Morehead, Kentucky. He was assigned to the 552nd Operations Support Squadron, Tinker Air Force Base, Oklahoma.