A fire that broke out in a Winnipeg food plant Friday caused a whopping $20 million damage to the building.

Fire crews were at the Maple Leaf Foods plant for hours in the afternoon, battling a fire that appeared to be burning largely on the building’s roof.

The plant had to be evacuated while firefighters worked to bring the blaze under control. Fire officials said a portion of the roof had to be knocked down just before 2 p.m.

No one was injured in the blaze, but the damage was pegged at $20 million by the Office of the Fire Commissioner.

Friday night fire officials said they believed the fire was accidental and that it started on the roof when hot roofing materials ignited.

Officials from Maple Leaf Foods said they have not yet personally confirmed damage estimates or the cause of the fire.