OIL CITY, Pa. (AP) — A house fire in northwestern Pennsylvania claimed the lives of three people over the weekend, authorities said.

The Oil City fire department was called to the home shortly before 1 a.m. Saturday. Chief Mark Hicks told the Oil City Derrick that arriving crews found a “well seated working structure fire” and made “numerous attempts to do primary searches” for people reported possibly trapped, but deteriorating conditions brought the search to a halt.

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Hicks said firefighters resumed searching once the fire was deemed under control, and found the three victims. No further information was immediately released about the blaze or the victims.

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The Oil City police and fire departments are investigating along with a state police fire marshal.

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