By: KDKA-TV News Staff

STOWE TOWNSHIP (KDKA) — The Allegheny County Police Department is investigating possible arson at a building in Stowe Township.

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Police say officials were notified of a possible arson set at a two-unit duplex on Island Avenue on Thursday.

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Law enforcement said one person was inside the building when the fire started. The person escaped and was not injured.

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Police say four firefighters were injured when the duplex’s front porch collapsed. They are being treated at local hospitals with non-life-threatening injuries.