Provincial army commander Abdul Razaq says the strike took place Monday morning in Logar province's district of Baraki Barak, about 50 kilometers (30 miles) east of Kabul. He says five troops were also wounded in the strike.
Other Afghan officials also reported the strike, though they gave slightly different number of casualties.
District governor Mohammad Rahim Amin says the NATO strike was likely a mistake, due to bad coordination in an area where Taliban insurgents are highly active.
A U.S. military official in Afghanistan, speaking on condition of anonymity in line with regulations, said they are aware of an incident in Logar and are investigating it.
US airstrike hits Afghan security forces, not Taliban, kills fr...