It is reported by RIA Novosti with reference to the Investigative Committee of the Russian Investigative Committee for Yugra.
Later, the department clarified that the death of five people was officially confirmed, three are considered missing.
Earlier, the head of the Ministry of Emergency Situations of Russia, Alexander Kurenkov, said that the cause of the explosion in a house in Nizhnevartovsk was the depressurization of a gas cylinder.
Investigators opened a criminal case on the fact of a partial collapse of a residential building in Nizhnevartovsk.