Two factory buildings, two Portakabins and a trailer unit were severely damaged in a fire in Appleby Magna overnight.
Two fire crews, from Ashby and Moira, were called to Snarestone Lane at 2.05am. The water carrier from Loughborough also went to the scene.
Crews found two single storey industrial units measuring 30m by 14m on fire. A second seat of fire was also discovered in a Portakabin on site and a third in the tractor unit of an articulated lorry.
A crew from Coalville fire station is still at the scene and a fire investigation officer is there trying to establish the cause of the blaze.