An industrial building in northeast Calgary sustained heavy damage in a fire on Monday night, with the roof of one of the bays collapsing in the fire.

Fire crews responded to the scene at a five bay industrial building on 12 St. and 40 Ave. N.E. at around 9:30 p.m. on Monday.

They upgraded the call to a second alarm before they got there, due to the significant amount of smoke and fire seen in the sky as they approached.

Crews managed to contain the fire to a single bay by using a strong defensive technique.

They remain on scene to watch for further flare ups.

No one was injured in the fire and the cause is still unknown.