Officials say the apartment building contains 20 units, all of which are occupied.

DREXEL HILL, Pa. (WPVI) -- One person died and five others, including a firefighter, were hospitalized following an apartment fire in Drexel Hill late Saturday morning.
The fire broke out just before 11 a.m. on the 3200 block of Township Line Road, according to Upper Darby Fire Chief Nick Martin.
All six individuals were taken to the hospital for treatment and evaluation. One person was pronounced at the hospital.
Officials say the apartment building contains 20 units, all of which are occupied. Residents have been safely evacuated.
Action News obtained video from a neighbor, Brennan Donohue, showing firefighters on ladders rescuing people from their balconies as smoke poured from the building.
The cause of the fire remains under investigation.