WASHINGTON (AP) — The Obama administration ordered U.S. airlines not to fly over Iraq following the first U.S. airstrikes there Friday, while carriers from other nations said they were suspending service to the Iraqi city of Irbil because of the hostilities.

A Federal Aviation Administration notice to pilots says the ban was prompted by the “potentially hazardous situation created by fighting between militants” associated with the Islamic State group and “Iraqi security forces and their allies.”