A major fire broke out at a commercial building in Anjou Monday night.

The Montreal fire department was alerted to the blaze at Colbert and Larrey Sts. at 6:19 p.m.

They say it’s a three-alarm fire that spread to the roof of the large building. Firefighters confirmed that the fire started accidentally when insulation caught fire after an electrical short circuit.

There were some 90 firefighters and 35 vehicles called to the scene.

The fire was under control at 7:50 p.m.