Shropshire Fire and Rescue Service were called to a fire at M and B Travel in Trench Road, Telford at 7.06am Sunday 25th November involving a Transit minibus and caravan.
The fire also involved a neighbouring shed containing rabbits.
Two appliances from Wellington and one appliance from Telford attended the scene together with a Fire Investigation Officer.
The fire is being treated as deliberate and anyone with any information is being asked to contact West Mercia Police on 101 or Crimestoppers anonymously on 0800 555 111.
The road was closed for about half an hour while fire crews dealt with the incident.