A TASS source on the cause of the explosion at the Listvyazhnaya mine in Kuzbass: a sudden release of methane 
in the Kemerovo region. A law enforcement source told TASS that the cause could have been a methane release.
“Previously, there was a sudden release of methane, then there was an explosion. But the specific reason for the release has not yet been established, the competent and investigative authorities are now looking into this, ”the interlocutor explained.
Experts will study the operation of sensors at the mine, and also find out whether they showed correct data on methane concentration or not … “Now they are also dealing with this,” the source said.
Previously, an anonymous employee of Listvyazhnaya, in a conversation with Lenta.ru, said that for years the management of the mine ignored the problem of increased gas pollution in the mine, and offered all dissenting employees “Go into the cold.”
A gas explosion at the Listvyazhnaya mine took place on the morning of November 25. 51 people died, 63 were injured. On the same day, the Governor of Kuzbass Sergei Tsivilev announced a three-day mourning in the region for the miners and rescuers who died at the mine. It will last from 26 to 28 November.
Criminal cases have been initiated into the tragedy under Part 3 of Article 217 of the Criminal Code of the Russian Federation (“Violation of safety requirements for hazardous facilities, resulting in the death of two or more persons”) and Part 3 of Article 293 of the Criminal Code RF (“Negligence resulting in the death of two or more persons”).