An aircraft has crashed in a field in Lincolnshire, police have said.
Emergency services were called to Coningsby shortly before 13:20 BST on Saturday and remain at the scene.
A Lincolnshire Police spokesperson said the crash involved a "single-occupant aircraft" but would not be drawn on the type. No details of any casualties have been given.
Road closures are in place around Dogdyke Road and Sandy Bank, with motorists asked to avoid the area.
The spokesperson confirmed the aircraft had not come down at RAF Coningsby - the home of the RAF's Battle of Britain Memorial Flight and two frontline, combat-ready squadrons.
The Ministry of Defence said it had no comment to make at this time.