Arson is the suspected cause of a fire in Chesham in which four vehicles caught fire outside an industrial building in Asheridge Road, Chesham.
One fire appliance with crew attended from Beaconsfield fire station, one from Berkhamsted fire station and one from Hemel Hempstead fire station. An officer also attended.
Firefighters used a main jet, two hose reels and four sets of breathing apparatus during the operation to extinguish the fire.
The fire also caused external damage to a building.