CHICAGO (CBS) – Two buildings went up in flames on the overnight in the North Lawndale neighborhood near Douglas Park.

The 2-11 alarm fire broke out around 12:15 a.m. Friday in the three-flat apartment building, at 3122 W. 15th St. just east of Kedzie Avenue, according to Fire Media Affairs Director Larry Langford. The fire spread to the building next door, also a three-story brick structure, at 3128 W. 15th St.

The roof of the second building partially collapsed.

The building where the fire broke out was vacant and boarded up, but there were still several people inside. They were not injured, but they had to be placed inside warming buses, Langford said.

A third building “was threatened” by fire, but firefighters were able to keep the blaze from spreading to the building, Langford said.

The fire was out by about 1:20 a.m. No one was injured, Langford said.

Investigators believe the fire might have started on the back porch of the 3122 building. There is no word on what caused the fire.

The Sun-Times Media Wire contributed to this report.

Watch & Listen LIVE