HAZLE TOWNSHIP, LUZERNE COUNTY (WBRE/WYOU)— An investigation is underway into what caused a late-night fire that killed two people in Luzerne County.

Just before midnight, multiple crews were called to a home on the corner of 17th and Arthur streets in Hazle Township for a second-alarm fire with entrapment.

According to state police, firefighters arrived on the scene to heavy black smoke and a fully engulfed home.

While working to extinguish the blaze, first responders said they were made aware of two people still in the home.

According to the Luzerne County Coroner, two people died in the blaze. Autopsies have been scheduled for Monday.

Crews remained on the scene overnight to put out remaining hot spots into the early morning hours.

A Pennsylvania State Police Fire Marshall was called to the scene and determined the fire was not suspicious. The cause of the fire has not been determined at this time.

State police are actively investigating this incident.