By BY PAULINE JELINEK and LOLITA C. BALDOR
WASHINGTON — The military is investigating what appears to be the first case of American troops killed by a missile fired from a U.S. drone.
The investigation is looking into the deaths of a Marine and a Navy medic killed by a Hellfire missile fired from a Predator after they apparently were mistaken for insurgents in southern Afghanistan last week, two senior U.S. defense officials said Tuesday. The officials spoke on condition of anonymity because the investigation is ongoing.
Unmanned aircraft have proven to be powerful weapons in Afghanistan and Iraq and their use have expanded to new areas and operations each year of those conflicts. Some drones are used for surveillance and some, such as the drone in this case, are armed and used for hunting and killing militants.
Officials said this is the first case they know of in which a drone may have been involved in a friendly fire incident in which U.S. troops were killed, and they are trying to determine how it happened.
Marine Staff Sgt. Jeremy Smith of Arlington, Tex., and Seaman Benjamin D. Rast of Niles, Mich., were hit while moving toward other Marines who were under fire in Helmand province.
Military officials in Afghanistan declined to provide any details, saying only that it was a friendly fire incident. "A formal investigation will determine the circumstances that led to the incident," the International Security Assistance Force said in a statement last week.
But reports from the field indicate that the Marines who were under attack mistook Smith and Rast for militants heading their way and called in a strike from a U.S. Air Force Predator, one official said.
The Marines have been in a fierce fight in the south, battling insurgents in key Taliban sanctuaries such as Sangin, a militant stronghold.
Currently, Air Force Predators and Reapers, the high-flying hunter-killer drones, are logging 48 of the 24-hour air patrols a day, moving toward a goal of 65 in 2013. The aircraft are prized for their intelligence gathering proficiency and ability to pinpoint targets, reducing the risk to U.S. pilots and other personnel.
Under pressure from Defense Secretary Robert Gates, the Air Force has dramatically increased the number of armed and unarmed drones in the war zones over the past three years.
Other military services have their own drones, ranging from the Army's smaller shoulder-launched Ravens to the sophisticated, high-altitude Global Hawks, which are used for surveillance missions and do not carry weapons.
The military's use of armed drones in Afghanistan has become a flashpoint for Afghan anger over civilian deaths in the nearly 10-year-old war.