NORTH PHILADELPHIA (WPVI) -- Firefighters battled smoke and flames inside a vacant school in North Philadelphia early Thursday morning.
The fire broke out just past 1:00 a.m. on the 1200 block of West Allegheny Avenue.
Crews arrived to find smoke and flames showing on the second floor of a five-story old elementary school building.
They quickly put out the flames and began to ventilate the building.
Investigators are trying to figure out how the blaze started.
Smoke and flames inside vacant school in North Philadelphia
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