Two female teenage air cadets and two Royal Air Force (RAF) instructors were killed in a mid-air collision of two RAF training aircraft in Britain Wednesday.
The two light aircraft crashed over sand dunes in a nature reserve in south Wales, in the south-west of Britain, police said.
The two girls, of school age, were taking part as air training corps cadets in a half-hour flying experience offered by the RAF, dpa reported.
An RAF spokesman confirmed that two members of the RAF and two Air Training Corps cadets had "tragically died" in the crash.
A full investigation was launched into the accident.
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