DUNMORE, Pa. (AP) — Authorities say a fire in a northeastern Pennsylvania building has claimed the lives of three people and sent four other people to hospitals.

The Lackawanna County district attorney's office said investigators have identified the victims of the fire in Dunmore, but their names were't immediately released pending notification of relatives.

Authorities said flames were reported just before midnight Monday in a building that formerly housed a deli.

Officials said the remains were discovered on the third floor. A fire marshal said the blaze originated on the second floor of the building.

Three people were taken to Geisinger Community Medical Center. A fourth person was taken to Moses Taylor Hospital but later flown to the Lehigh Valley Health Network Regional Burn Center in Allentown. Condition reports on the victims weren't immediately available.

The borough's fire chief, Chris DeNaples, said the cause of the fire remains under investigation by the borough and state police fire marshals.