Firefighters work on hot spots in the front section of the home that collapsed during an early morning fatal fire on First Street in Nescopeck, Pa., on Friday. Associated Press

Jimmy May

NESCOPECK, Pa. — Authorities say at least half of the 10 people found dead after an early morning fire in northeastern Pennsylvania died of smoke inhalation.

The Luzerne County coroner's office said autopsies on the victims of the early Friday blaze in Nescopeck began Saturday. Examinations by Dr. Gary Ross were completed on three women, one man and a girl, the office said in a news release.

Determining the manner of death — classifying the deaths as accidents or homicides, for example — for the victims is pending the outcome of the fire investigation, the coroner's office said. Positive identification of the victims is pending review of medical records, dental records and DNA if required, the coroner’s office said.

State police said seven adults ranging from late teens to age 79 were killed along with children aged 5, 6 and 7.

The county's district attorney, Sam Sanguedolce, said a preliminary investigation suggests the fire broke out on the front porch at around 2:30 a.m. Friday. He said it appears that “the fire started and progressed very quickly, making it very difficult to get out.”

Nescopeck is a small town on the Susquehanna River, about 20 miles southwest of Wilkes-Barre. The house was on a residential street of largely owner-occupied, single family homes.