A man has been arrested following a fire at a historic building in Belfast's Cathedral Quarter.

More than 50 personnel were involved in fighting the fire at Old Cathedral Building on Donegall Street from the early hours of this morning.

A Northern Ireland Fire and Rescue Service (NIFRS) spokesperson said they were alerted to the blaze at 5.37am.

The Police Service of Northern Ireland said the fire is being treated as suspected arson, and issued an appeal for information.

On Monday afternoon, a spokesperson said officers remain at the scene along with colleagues from Northern Ireland Fire and Rescue Service.

An 18-year-old man has been arrested on suspicion of arson endangering life with intent.

"A number of diversions are still in place for motorists and we would advise the public to avoid the area where possible," they said.

"Inquiries are ongoing and I would appeal to anyone with information or who has CCTV or dashcam footage from the area at the time of the incident to contact detectives at Musgrave on 101, quoting reference number 197 03/10/22."

The NIFRS sent eight fire appliances from Belfast, a Command Support Unit from Lisburn, two aerial appliances, 52 firefighters and five officers to the scene in the early hours of this morning.

The building hosts a number of small creative businesses.

Business owner Tina Calder at the scene of the blaze

Tina Calder, owner of Excalibur Press, which has offices in the building, said: "I got a call this morning just before 6am. My brother is a security guard at the Ulster University and he said, 'Tina, your building is on fire'.

"Of course, I sprang up, got a taxi, came in and literally for about an hour-and-a-half, just stood here crying watching the building go up in flames.

"I was able to give them keys, ring the landlord and the agent, and I made contact with the other tenants in the building as much as possible.

"It was just heartbreaking as I watched people's studios go. One man owns a violin-making studio - it was gone. There are illustrators in there that have artwork.

"We can see that our offices are probably going to have significant water and smoke damage. All five of my staff are working from home today."

Ms Calder added: "We've had a wonderful outburst of support from the community here in Cathedral Quarter, asking what can they do to help, and it's just wonderful to see that community come together to support us."