The US Air Force has said that its Office of Special Investigations is reviewing an incident at the Kabul airport on Monday in which multiple people were killed when hundreds of Afghan civilians desperate to leave the country swarmed a C-17 cargo plane as it was attempting to take off.

The Air Force did not say how many people died. It said human remains were found in the plane's wheel well after it landed at al-Udeid Air Base in the Gulf state of Qatar.