It then spread to the adjacent boarded up old theatre where fire was coming through the roof. Fire crews are attempting to stop the flames from spreading to the Lantern House on Princess.
There is a fear the roof of one of the buildings in the block down to Princess could collapse.
Traffic is blocked off around the block from King Street to Princess and down to Germain.
Smoke could be seen billowing over the uptown and it set off a smoke alarm in the nearby Admiral Beatty. There's no word yet on whether anyone has been injured.
