Boston firefighters responded to 31 Hazelton St. around 3:45 a.m. on Saturday for what turned into a two-alarm fire.

The Boston Fire Department reports the fire, which burned through the roof, displaced nine adults and five children, but that there were no injuries.

The fire did an estimated $750,000 in damage to the multi-family building.

Volunteers from Boston Sparks, in addition to providing water for firefighters, spread around a lot of rock salt in the sub-freezing temperatures, the department adds.