US Central Command has confirmed that an American military refuelling plane went down in Iraq, and rescue efforts are underway. The KC-135 aircraft was part of the operation against Iran, but the crash was not due to hostile fire or friendly fire, the military said in a statement. US Central Command, which oversees the Middle East, said that two aircraft were involved and that one landed safely and the other went down in western Iraq. The tanker is the fourth publicly acknowledged aircraft to crash as part of the US military’s operations against Iran. Last week, the military confirmed that three American fighter jets were mistakenly downed by friendly Kuwaiti fire.