Fire badly damages former Ysgol Glanadda in Bangor
North Wales fire crews and the police are investigating the cause of a fire which badly damaged a former school building in Bangor.
They were alerted at about 00:30 BST on Saturday to the blaze at the Bryn Llwyd education unit on Caernarfon Road.
The building, which is understood to date from the Victorian era, used to house Ysgol Glanadda.
North Wales Fire and Rescue Service said the flames were put out by about 05:30 BST.
Tommy Rowlands, of the fire service, said there had been extensive damage to the main hall.
He said contractors were also on the site to make the mains electric supply safe.
The fire service said later that nobody was injured and the building was unoccupied at the time.
Gwynedd council officers were boarding up the building.
A Gwynedd council spokesperson said: "Following a fire at the Bryn Llwyd education unit last night, council officers are working with the emergency services to safeguard the site.
"The Bryn Llwyd unit provides educational support for a small number of key stage 4 pupils (years 10 and 11) who no longer attend a mainstream school setting."
Four pumps were sent to the scene, two from Bangor, one Beaumaris and one from Caernarfon.
Eirian Roberts, who lives six doors away from the school, said she became aware of the fire at about 01:25 BST and went out to take photographs.
"I'm gutted this has happened. This is where my grandfather went to school, my mother went to school there, as did her brother, and my brother.
"I think the building is listed, as it was built in 1888, and the damage to the front is really bad.
"I know it is just a school, but it's part of our history as I can trace my family back in this area of Bangor for 170 years. I'm very upset," she added.