A five-alarm fire in the west end burned for hours on Wednesday night and lasted well into Thursday morning, bringing more than 100 firefighters to downtown Toronto.

The fire began in a business on Dundas Street west of Bathurst Street around 11:30 p.m. on Wednesday. A person who lived in one of the apartments above the business called 911.

Two of the firefighters were hurt during the blaze, one suffering an injured rib and the other an injured hand. No other injuries were reported.

The fire was in an older building and it was a difficult one to put out, division commander Bob O’Hallarn said.

“We’re finding we knock it down and it seems to flare up in another area … and that’s why we have crews up on the roof,” he said.

“A couple times we’ve pulled crews off the roof because it seemed to be getting a bit spongy.”

The cause of the fire, and the cost of the damage, is not yet known. The Ontario Fire Marshal’s office is investigating.

A five-alarm fire burns on Dundas Street west of Bathurst Street on June 30, 2016. CITYNEWS/Hugues Cormier