"The investigative bodies of the Investigative Committee of the Russian Federation in the Altai Territory are conducting a pre-investigation check," the message says.
According to preliminary data from the investigation, the cause of the incident could be faulty gas equipment.
During the audit, a legal assessment will be made of the work of persons whose duties include the maintenance of gas equipment.
Earlier, as a result of a gas explosion in an apartment building in Barnaul, two people were injured, one of them was a child.