Emergency services are dealing with an "incident" at an airport in north Wales.
Police, fire crews and the ambulance service were sent to Caernarfon Airport on Wednesday evening.
The airstrip is used for training flights and by the Wales Air Ambulance along with HM Coastguard helicopters operated by Bristow, according to its website.
One witness told the Daily Post he had seen a plane crash on to the tarmac and explode.
He said: "The first thing I noticed was that the plane had no landing gear on. And then I realised it was going too fast.
"It came in and hit the tarmac and loads of debris came off it, it was a sort of belly flop and it bounced up. It had caught fire straight away. When it hit the ground again it exploded."