Police in Angus are appealing for information after a vacant building was found alight at Glen Doll Farm, Glen Doll, Kirriemuir, Angus at about 6.45pm last night (Wednesday).
Substantial damage was caused to the building in the incident.
Officers are keen to speak to two cyclists who alerted neighbours to the fire and would ask them to make contact with the police as they may have further information that could assist with the enquiry.
Anyone who was in the area at the time and saw or heard suspicious activity should contact Police on 101 or speak to any police officer.
Alternatively information can be passed anonymously to the charity Crimestoppers on 0800 555 111.