A sign at the entrance to RAF Valley in north Wales, where a Red Arrows jet crashed following an incident.
The single-engine Hawk aircraft, made by British defence company BAE, crashed over RAF Valley in Anglesey on Tuesday afternoon. "We are investigating the incident", it said on Twitter.
It is understood the Red Arrows aircrew had been at RAF Valley for routine Hawk simulator training - something that takes place once a month.
One told the Daily Post: "It looked like it was about to land then next thing I saw was the parachute and then the plane hit the runway and went up in flames".
North Wales Police are also in attendance.
Red Arrows engineer Corporal Phil Broadbent, who organised the match, said: "Physical fitness and teamwork is a big part of the Royal Air Force and we play football on a regular basis, so I thought why not put all the practice to good use for charity".
She said the air ambulance was at the scene "for a very long time".
The RAF is asking eyewitnesses with photographs of the incident to send them in to help with the investigation and not share them online.
The pilot's condition is not yet known.
'The engineer's family have been informed and have asked for a 24-hour period of grace before further details are released.
The RAF confirmed the pilot of the Hawk aircraft, which is used by the famous aerobatic display team, survived and was receiving treatment in hospital.