The Boston Fire Department reports "careless disposal of smoking material" made 12 people homeless and injured a firefighter this morning at 24 Freeman St., right behind the inbound platform at the Red Line Fields Corner station.
The department says the fire started under the 2 1/2-story home's rear porch and went to two alarms after firefighters arrived around 10:15 a.m.
The injured firefighter suffered burns, the department says, adding damage was estimated at $300,000.