A fire at a Southwick warehouse is believed to have been arson and Wiltshire Police is investigating the incident.
The fire happened at around 7pm on Sunday at a building, in Poplar Tree Lane, which Frome Scaffolding rent from a local farmer and houses some of their vehicles.
Following an investigation of the site fire offices believe the blaze was started deliberately and Melksham CID is investigating it.
A Wiltshire Police spokesperson said: "Crime scene investigators have been at the scene and we have been liaising with Wiltshire Fire and Rescue Service.
"We are very keen to hear from anyone who saw any suspicious activity in the area around Poplar Tree Lane in Southwick on the evening of Sunday, 27 January.
"We would also be grateful to hear from anyone who believes they have information which could be of use to us in our investigation."
Around 40 firefighters, six engines, a water carrier and an incident control unit attended the fire with ambulances on standby.
Nobody was injured in the incident but two of Frome Scaffolding's vans were damaged as was the building.
Anyone with information can call Wiltshire Police on 101 asking for Detective Sergeant Simon Childe in Melksham CID or alternatively call Crimestoppers anonymously on 0800 555 111.