It is not clear how the blaze started.

By: KDKA-TV News Staff

WASHINGTON, Pa. (KDKA) — One person died after a house fire in Washington County on Friday night.

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(Photo Credit: Ian Smith/KDKA)

The fire was on Central Avenue, and dozens of firefighters responded to the call, which came in around 9:25 p.m.

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75-year-old Karen Campbell was pronounced dead at the scene.

The State Police Fire Marshal is investigating the cause of the fire.

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Stay with KDKA for more on this developing story.