The administration said that, "according to preliminary information, four people died as a result of carbon monoxide poisoning."
“The bodies of a man, a woman and two children - a boy and a girl were found,” the message says.
According to the regional prosecutor's office, the incident occurred in a private house in the village of Zheleznovodsk.
Earlier it was reported that two children died in a fire in a private house in Yuzhno-Sakhalinsk, four people were hospitalized.