Fire investigators in Philadelphia are trying to determine what caused a weekend apartment fire that left nearly two dozen people hurt, including two firefighters.
Fire Commissioner Lloyd Ayers says the five-alarm fire at the Austin Manor Apartments in northeast Philadelphia injured 21 people early Sunday.
Officials say three of the injured residents are in critical condition. Some residents were jumping from the building to escape the flames.
Ayers says one of the firefighters was burned and the other was hit by a car while directing fire-rescue vehicles.
The fire broke out around 4:30 a.m. and was declared under control in about two hours.