Firefighters are tackling a large blaze at the University of Bristol.
The fire started on the top floor of the university's five-story Fry Building, which was unoccupied as it is undergoing refurbishment.
Images posted to social media show large flames and smoke billowing from the scene, close to the city's Wills Memorial Building.
Avon Fire and Rescue Service was called to the scene at just after 5pm on Saturday and sent seven fire engines, along with two turntable ladders.
A spokesman said: "There have been no reports of any hazardous materials or any injuries. We will continue to fight the fire, but it appears to be going very, very well."
He said the fire does not appear to have spread to other floors in the building or to surrounding buildings, which were also unoccupied.
The Grade II listed Fry Building is on the university's campus between Woodland Road and University Road.
According to the university's website it is undergoing a £33 million renovation to become the new school of mathematics.
Will Marsh, the university's head of media, said: "The fire is in what's called the Fry Building, which is our maths building. It is undergoing renovation, so it was closed.
"It is not a building currently in use so it would not have had anybody in it."