Ten fire engines attended on Monday night
Investigations are under-way after a fire at Manby show ground.
Reports of a blaze and explosions at the old airfield site were received by Lincolnshire fire and rescue on Monday night.
Ten fire engines from across the region attended the scene, where a fire had started in one of the aircraft hangers.
The fire was started when flammable materials were accidentally set alight by a welding tool.