An Israeli couple were found dead in their Jadeidi-Makr home by Magen David Adom (MDA) paramedics on Saturday.
40-year-old Abed Husri and his partner, 35-year-old Atef Husri, most likely died due to carbon monoxide poisoning from a charcoal oven that was left turned on, according to MDA.
According to preliminary reports of the incident, the couple turned the oven on to heat their house in Jadeidi-Makr, an Israeli-Arab town located east of Acre.
According to Israeli media, their three children played outside the house when their grandfather asked where their parents were. The children reportedly replied that they "did not wake up yet."
The grandfather, who found the couple unconscious in their bed, called MDA and Israel Police, who were forced to determine the couple's deaths at the scene.
The couple's children most likely survived the poisoning due to sleeping in their grandparents' house the night before.
"This is an unbelievable tragedy," Jadeidi-Makr Regional Council head Sohail Malham told Ynet. "We are still looking into the circumstances of the incident, but this is a heart-breaking disaster."
In a similar incident last year, a 14-year-old boy was moderately injured after spending an extended period of time in a closed room heated by a charcoal barbecue grill.
CO poisoning from the use of kerosene stoves or coal-based heating devices can be lethal. Symptoms of poisoning include dizziness, nausea, vomiting, fatigue, weakness and a general bad feeling.
Israel Police are looking into the circumstances of the couple's deaths.