Two adults and three children were found dead in a quaint Pennsylvania cabin on Saturday, the New York Daily News reported.
While authorities have not officially declared the culprit as carbon monoxide poisoning, state police said a faulty heater is likely to blame in the case.
On Sunday, Lycoming County Coroner Charles Keissling is expected to announce the official causes of death, Trooper Angela Bieber told the Daily News.
The adult victims were identified as 23-year-old Jacqueline R. Stackhouse and 30-year-old Nathan L. Reece. However, the names of the children -- a 3-year-old boy, 9-year-old girl, and 4-year-old girl -- were not immediately released.
Aside from Stackhouse and her son, it is unknown how the victims are related, FoxNews.com said.
Investigators said all five victims were found with toxic levels of carbon monoxide in their blood. Additionally, it seems that no one tried to escape -- leading officials to presume they all died in their sleep.
According to Bieber, a relative of the cabin's owner held a party at the home on Friday night and slept outside in his car. When he woke up the next day, he discovered the family dead inside.
While state police do not consider the case to be suspicious, a full investigation is still ongoing.
"It was a hysterical scene, especially for the parents of some of the victims," State Police Capt. David Young told the Williamsport Sun-Gazette.
