A 12-year-old boy has been arrested on suspicion of arson following a fire in a cornfield at a farm near Nuneaton.
Firefighters were called to the field at Brett Hall Farm, Ansley Common at about 1330 BST on Tuesday.
About 10 firefighters took three hours to bring the fire under control.
Damage estimated at about £8,000 was caused.
A 12-year-old boy was arrested in connection with the fire on Tuesday.
He was bailed until 20 August while the police make further inquiries.