Arsonists set fire to a skip in Huntingdon on Saturday.
Firefighters were called to Windover Road at about 10.45pm following reports that a skip was ablaze.
A spokesman for Cambridgeshire Fire and Rescue Service said: “A large skip was well alight located close to pallets and a building. Two hose reels were used to extinguish it and the crew returned to station by 11.40pm.”
An investigation revealed that the cause of the fire was deliberate.
Anyone with information should contact the police on 101 or Crimestoppers, anonymously, on 0800 555111.