Not much in the way of detail being confirmed here at the base but what we understand to have happened is this - a British soldier at the base was overpowered, his vehicle was taken from him by a man who has been described as locally employed contractor, but I am told he is not an Afghan.
He drove the truck onto the main runway just as Leon Panetta's plane was approaching. He crashed, the circumstances of that crash are still unclear, but a flash was said to come from his vehicle. It's not being described as an explosion at this stage.
He was taken from the truck, said to be on fire at the time, and is now in hospital at the camp being treated for severe injuries.