Kurdish Peshmerga fighters stand guard at the front line with militants from the extremist Islamic State group, at the Khazer checkpoint outside of the city of Erbil in northern Iraq, August 8, 2014.
US military officials say American fighter aircraft struck and destroyed several vehicles on Sunday that were part of an Islamic State group convoy moving to attack Kurdish forces defending the northeastern Iraqi city of Erbil.
American soldiers and civilians are living in that Kurdish city.
Officials say in a statement that the air strike was one of a series against militants in Iraq in recent days.