One firefighter suffered a minor injury at a two-alarm Friday-morning fire in a three decker at 7 Rowell St., the Boston Fire Department reports.

Firefighters responded at 7:55 a.m. to find a basement fire extending into the first floor, the department says.

Some 13 residents were displaced, the department says, estimating damage at $100,000.

The fire came less than a day after a fire on Fuller Street displaced 15.