The Hawk aircraft is thought to have crashed early this afternoon near the RAF Valley base in Anglesey and two people ejected, according to a witness.
The jet was destroyed by the crash and the condition of the two people onboard is unknown.
Group captain Nick Tucker-Lowe said in a statement: “It’s with great sadness that the RAF can confirm the death of an engineer from the RAF aerobatics team the Red Arrows in a tragic accident today.
“The engineer’s family have been informed and have asked for a 24-hour period of grace before further details are released.
“The pilot of the aircraft survived the incident and is currently receiving medical care.”
Defence Secretary Gavin Williamson said: “Our thoughts and prayers are with the family, friends and colleagues of the RAF engineer at this incredibly sad time.”
We are aware of an incident today at RAF Valley involving a Hawk aircraft. We are investigating the incident.— Red Arrows (@rafredarrows) March 20, 2018
The Red Arrows tweeted: “We are aware of an incident today at RAF Valley involving a Hawk aircraft. We are investigating the incident.”
Deno James, a pipe welder for O’Connor Utilities, saw the aftermath of the crash and said: “I was near the compound and the plane came around to do a practice landing on the runway.
“It missed the runway and landed at the left-hand side. Two pilots were ejected about 200 yards from the ground.
“I pulled up for a moment in my truck watching and watched the plane come over my head.
“I know it was a Red Arrow because I’ve seen them at an air display before.”
Paramedics and an air ambulance were called to the base.
A Welsh Ambulance Service spokesperson said: “We were called shortly before 1.30pm this afternoon to reports an aircraft had crashed at RAF Valley in Holyhead.
“There is an emergency ambulance and a Wales Air Ambulance at the scene.”
The world-famous Red Arrows aerobatic team performs stunts and daredevil displays, and fly the distinctive Hawk jets.
RAF Valley is home to No 4 Flying Training School, which trains pilots in mountain and maritime warfare. The military’s Mountain Rescue Service is also based there.
In total, around 1,500 people work at the base.