A BUILDING fire which saw emergency crews called in last night is being treated as arson.

North Yorkshire Fire and Rescue Service say they were called out at 6.12pm last night (May 31) to  Stoneybrough Lane in Thirsk.

A service spokesman said: "Crews from Northallerton and Boroughbridge responded to a report of a fire in a derelict barn, one hose reel was used to extinguish the fire which was started deliberately."