Several people were treated for smoke inhalation, and the occupants of 14 units at McCarthy Manor on South Crouse Avenue in Syracuse were evacuated Sunday afternoon.
One person was taken to the hospital with unknown injuries.
The fire was on the eighth floor of the building, causing heavy smoke damage in the 14 units. The Red Cross was on hand to help the occupants find shelter for the night.
Fire crews knocked the fire down within minutes, according to officials.
The cause of the fire is still under investigation.