(CNN) -- Nine International Security Assistance Force service members were killed Tuesday when their helicopter crashed in southern Afghanistan, the force said.
Two other service members, along with an Afghan National Army soldier and an American civilian received injuries in the crash. They were taken to a NATO medical facility.
There were no reports of enemy fire in the area, and the cause of the crash is under investigation, the force said.
ISAF was formed under a U.N. mandate to bolster a secure environment and support the reconstruction of Afghanistan.
NATO took command in 2003.
The force comprises about troops from more than 40 countries, according to the organization.