Sixteen people were displaced in a Friday morning three-alarm fire at a mixed-use Talbot Avenue building in Codman Square, Boston Fire Department officials said.

Firefighters responded to the 320 Talbot Ave. building fire at about 6:40 a.m. Heavy smoke was already showing when they arrived, the department tweeted.

The building is a three-story structure housing Alex Market on the first floor, below two floors of residences. All occupants were safely evacuated, and no injuries were reported.

By 7:15 am., the blaze was knocked down, Boston Fire said. It caused about $750,000 in damages and the cause of the incident is under investigation.

Earlier this morning, firefighters responded at 5:36 a.m. to 614 River St. for a fire that sent one resident to the hospital with non-life threatening injuries, the department reports.

Five residents were displaced by the fire, which did an estimated $100,000 in damage.