Up to nine Prince George’s County families have been displaced after a fire ripped through an apartment building in Chillum on Sunday afternoon.

The blaze broke out shortly before 4 p.m. in a three-story building in the 600 block of Sheridan Street, fire officials said.

When firefighters arrived, there was heavy smoke coming from the second floor and reports that two residents, both adults, were trapped in their units.

Firefighters helped one trapped resident escape through the interior stairwell of the building, while the other had to be removed from his third-floor unit using a ground ladder.

Both residents were taken to Washington Medical Center with possible smoke inhalation injuries. No burn injuries were reported.

The fire, which officials said was in a second-floor bedroom, was put out in about 15 minutes.

Nine of the units are uninhabitable, according to officials. The County Citizen Services Unit and American Red Cross will assist with temporary shelter and basic needs.

The cause of the fire remains under investigation. Fire loss estimates are not yet available.