Crews responded to the fire at 59 Wales Avenue in Dorchester around 1:15 p.m. on Monday, June 27, Boston Fire Department said on Twitter.
The fire also spread to the adjacent building and crews were able to extinguish the fire within the hour, the department said.
Afterwards, the American Red Cross of Massachusetts was said to be on scene assisting those who were displaced.
The cause of the fire has yet to be determined.
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