Bosses of a city centre bar say they do not yet know when it can re-open after a fire caused 'extensive damage' in the early hours of Wednesday morning.

An investigation is today underway into the cause of the fire at All Bar One, on Tombland, at 3.33am.

Crews from Carrow, Sprowston, and Earlham extinguished the fire using hose reels and wearing breathing apparatus.

They ventilated the property using a positive pressure ventilation fan and also used a thermal imaging camera to check for residual hot spots.

The fire has left 'extensive smoke, heat, and water damage' to the building, and it is not yet known when the bar will reopen.

A spokesman for All Bar One said: 'The fire service are currently investigating the fire.

'However we understand there has been extensive smoke, heat and water damage to the building.

'Once we've had the opportunity to assess the damage, we plan to start work on the repairs and open the bar again as soon as we can.'

No one was reported injured.