Fire crews are battling a blaze at the old Strathmartine Hospital building in Dundee.
Firefighters were called at about 14:00 after the fire broke through the roof of the hospital, which has been disused since 2003.
Two appliances from the McAlpine Road fire station and two from Blackness Road were sent to the scene.
The blaze has caused extensive damage to the roof of the property. No-one is thought to have been inside.
Crews used hose reel jets and an aerial platform to douse the flames.
The building, previously a psychiatric hospital and orphanage, has been derelict for over a decade. A number of planning applications have been lodged over that time aimed at developing the site for housing.