NATO said on August 7 two gunmen wearing Afghan National Army uniforms turned their weapons on NATO troops, killing one U.S. soldier.
A coalition statement said the shooting is under investigation.
The shooting was the latest case of so-called "green-on-blue" attacks in which Afghan soldiers or insurgents disguised in their uniforms shoot at U.S. or NATO troops.
So far this year more than 25 coalition troops have been killed in such attacks.
That compares with 20 deaths in similar attacks the previous year.
Based on reporting by AP and AFP