A three-alarm fire that erupted around 5 a.m. last Friday at 36 Robinson St. left nine people homeless and resulted in an estimated $1 million in damages while causing no injuries. The Boston Fire Department said the fire started in a carriage house behind the three-decker, but that it also did some damage to the house itself.

On Saturday morning, a fire that started at 16 Nightingale St. shortly before 7:45 a.m. spread to 12 Nightingale and went to four alarms before firefighters were able to bring it under control. Some 12 residents were displaced and two firefighters suffered minor injuries, the department reported. Officials said that after the fire started in the rear of 16 Nightingale, both buildings’ rear porches collapsed, and their power lines came down.