KC-135 refuelling aircraft crashses in western Iraq: No hostile fire involved

A Boeing KC-135 aerial refuelling stratotanker aircraft went "down" in friendly air space Iraq, the US Central Command confirmed.
Two aircraft were reportedly involved in the incident. One went down in western Iraq, the second landed safely.
The incident was not due to hostile or friendly fire, CentCom stated as more information is still being gathered.
The status of the crew is currently unknown, official said.