Defense Department identification of U.S. military personnel who died in Afghanistan:
Billy A. Sutton, 42, of Tupelo, Miss.; sergeant first class, Army National Guard. Sutton died Tuesday of an undisclosed medical condition not related to combat while serving in southern Afghanistan's Oruzgan province, southwest of Kabul. He was assigned to the 223rd Engineer Battalion, 168th Engineer Brigade in West Point, Miss.
Sources: Department of Defense, Associated Press