Firefighters were called to a business on de Pontgravé Street near Laurentien Boulevard in Ahuntsic-Cartierville at around 12:30.
The fire was quickly put out by the building's sprinkler system. Montreal police spokesman Manuel Couture says firefighters discovered the store's front door had been broken and that the fire may have started near the door. These elements have led firefighters to believe the fire may have been deliberately set.
Nobody was hurt in the fire. The Montreal police arson squad is conducting an investigation.