Five American troops were killed in an apparent friendly fire tragedy in southern Afghanistan, the Pentagon confirmed Tuesday.
"Five American troops were killed yesterday during a security operation in southern Afghanistan," Pentagon Press Secretary Rear Adm. John Kirby said in a statement. "Investigators are looking into the likelihood that friendly fire was the cause. Our thoughts and prayers are with the families of these fallen."
A statement issued from coalition headquarters in Kabul did not include the nationalities of the casualties, but said the deaths are under investigation.
"Tragically, there is the possibility that fratricide may have been involved," the coalition statement said.
The incident comes as U.S. and allied forces are drawing down and turning the fight over to Afghan security forces.