A 45-year-old man has died after two gliders collided as they came into land at an airfield.
Northamptonshire Police said emergency crews attended the airfield at Hinton-in-the-Hedges near Brackley shortly before 4pm on Saturday.
Police and the Air Accidents Investigation Branch (AAIB) have launched an investigation into the incident.
Investigators are appealing for information including mobile phone footage.
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The collision came after a pilot died in a separate incident when a Spitfire crashed in a field near an RAF base in Lincolnshire.
Emergency crews were called to the scene in Coningsby following reports the plane went down shortly before 1.20pm on Saturday.