THE fire at the site of the former North Wales Hospital in Denbigh was a case of arson.
A spokesperson for North Wales Fire and Rescue said: “We have established that it was a deliberate ignition so the police will take over now.”
Five crews tackled the blaze over two floors at the derelict building.
Crews were called to at 8.04 yesterday morning.
The fire was in the vicinity of the ballroom and spread over three floors of the building and the roof space.
As reported in the Free Press last month the site of the former hospital is now the subject of a compulsory purchase order served by Denbighshire County Council.
The council have been in dispute with the owners of the building, Freemont (Denbigh) Limited, based in the British Virgin Islands.
The council has spent £900,000 on repairs for the building that the council felt were needed.
They are trying to recoup this money from the buildings owners.
A spokesperson for North Wales Police said: “This will be a joint police and fire investigation. Anyone with any information should get in touch with the police on the 101 phoneline.”