Hamilton fire crews were working to douse the flames licking the ceiling of an industrial building Thursday morning in downtown Hamilton.

Firefighters were cutting through a section of the roof at the G.S. Dunn Mustard factory just after 10 a.m., trying to find the source off the flames. Everyone got out of the building and there were no injuries, fire information officer Claudio Mostacci said.

“It’s isolated from the main building, so hopefully we can contain it here,” he said. Nine fire units were sent to control the flames.

It was too early for Mostacci to say how the fire started, or estimate what the cost of damages to the business will be.

Police say Park Street North is closed between York and Vine as firefighters work to get the flames under control.