Arsonists set fire to debris and electrical equipment at an industrial estate in Sheffield last night.
Yobs set file to litter and a fridge freezer at the Holbrook Industrial Estate in Holbrook Avenue at about 8pm.
A crew from Birley Fire Station spent 30 minutes putting the blaze out.
Elsewhere, a skip went up in flames in Bland Street, Burngreave, at 4.30am this morning.
A fire service spokesperson said it was started accidentally and a crew from Elm Lane Fire Station put the blaze out.