A pita factory in Montreal sustained heavy damage after a fire broke out early Tuesday morning.

It started just before 1 a.m. at the Montreal Pita building on Beaumont Street near Bloomfield Avenue.

When firefighters arrived, they found the building engulfed in flames, said Montreal Fire Operations Chief, Simon Limoges.

"The fire quickly spread to the roof," he said. "It was a five-alarm fire so about 125 firefighters were on the scene."

It took several hours for firefighters to bring the flames under control and ensure the fire was completely out.

Sixteen employees were in the building at the time the fire started. No one was injured.

Investigators believe a problem with a conveyor belt likely sparked the fire.