UPDATED - now includes video purporting to be of the crash.
US military charter airline National Air Cargo has confirmed that a Boeing 747-400 freighter crashed shortly after take-off at Bagram airfield in Afghanistan on 29 April.
News reports indicate the eight-member crew died in the crash, but National Air Cargo officials were unable to confirm the status of the crew. The airline was due to release more information about the crash later in the day.
The 747-400, registration N949CA, was owned by Wells Fargo Bank, according to the US Federal Aviation Administration.
It was operating at Bagram on behalf of the US Air Mobility Command, which oversees air cargo shipments by military and chartered aircraft. National Air Cargo is listed by the US Air Force as a member of the long-range, international group of airlines participating in the civil reserve air fleet programme.