A blaze took hold of a building on Aberdeen's Albyn Place overnight.
Fire crews were called to the scene at 9.30pm on Tuesday 12 September.
Six crews attended the fire, with three still on scene this morning.
At 11.35pm, a message was received to say the roof had collapsed.
Firefighters continued to tackle the flames for another six hours before the "stop" message was sent at 5.35am.
It's understood the building was vacant and undergoing renovation.
A spokesperson for Scottish Fire and Rescue Service said: "We were alerted at 9.33pm on Tuesday, 12 September to reports of a fire affecting an unoccupied building on Albyn Place, Aberdeen."
"At its height, Operations Control mobilised six appliances and a high reach vehicle to the scene and a number of appliances remain there on Wednesday, 13 September as crews work to make the area safe.
"There are no reported casualties.
Police have confirmed the road is closed and motorists are asked to use an alternative route.