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LANCASTER, Pa. (AP) — An early morning house fire has killed a central Pennsylvania couple and their adult daughter while a second daughter escaped the flames by jumping from a second-floor window.

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Fire department officials say and 83-year-old man, his 54-year-old wife and their 24-year-old daughter died in the fire early Monday in East Cocalico Township, Lancaster County.

Stevens Fire Company spokesman Martin Devlin says a 17-year-old girl jumped to safety at the urging of a police officer who responded to the scene. The teen was treated at a nearby hospital and released.

The names of the residents were not immediately released.

A state police fire marshal is investigating the cause of the blaze.