Firefighters say a third-floor apartment in building C at the complex was destroyed and there was smoke and water damage to the first and second floors.
An Abington Memorial Hospital official says about 15 people were brought to the emergency room for treatment, but all had been discharged within a few hours.
Doylestown Hospital spokeswoman Karen McCurdy says three minors were treated at the hospital for smoke inhalation and breathing difficulties, but all were released.
Anyone with information on this case is asked to call Warminster Police at 215-672-1000
