DUQUESNE (KDKA) — Crews battled a raging three-alarm house fire in Duquesne overnight with flames so intense that they seemed to jump from one house to the next. While the cause of the blaze is still under investigation, a Duquesne fire official told KDKA-TV that he has no doubt that the fire was intentionally set.

The fire started around 2 a.m. this morning in a vacant house along Friendship Street. A house next door also sustained damage.

Duquesne Fire Lt. Craig Gibson told KDKA that the department has responded to 5 or 6 suspicious fires in the last month alone.

Given how quickly the flames engulfed the building, Lt. Gibson said he believes an accelerant was used to start this fire.

Gibson added that one of the houses involved in this latest fire was already gutted by an earlier blaze two weeks ago.

The Allegheny County fire marshal is now investigating.

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