Gatineau Firefighters say a blaze at a pulp and paper plant Monday afternoon did "considerable" damage.
Firefighters were called to the Kruger Products plant at 20 Laurier Street in Hull just after 12:30 p.m. after a worker called 911.
The fire started on the roof, and shut down all work at the plant, forcing its evacuation.
A total damage estimate has not been calculated but Gatineau Fire officials expect it to be significant.
They say two workers had some minor issues, but ultimately did not need to go to the hospital.
The cause of the fire is not yet known.