Two firefighters were injured Wednesday as crews battled a massive, 6-alarm blaze in Chelsea, Massachusetts.
Fire officials said the fire broke out shortly after 3:30 p.m. at 10 John St. Fifteen people were displaced, officials told NBC10 Boston.
Multiple triple-deckers are now on fire. Aerial footage showed flames and smoke pouring from the roof of one building.
The fire has been burning for more than an hour, and has collapsed part of one building's roof.
Chelsea's fire chief confirmed two firefighters were hurt. One could be seen being taken to an ambulance on a stretcher. He appeared conscious as he was transported from the scene.
Neither injured firefighter's condition was known, but the injuries were not thought to be serious.
It is unclear how the fire started.