Listvyazhnaya mine manager Sergei Makhrakov, accused in the case of the deaths of miners at the Listvyazhnaya mine, during the election of a preventive measure to him at the Central District Court in Kemerovo. On the morning of November 25, smoke began to form in the Listvyazhnaya mine at a depth of 250 meters. The cause of the incident was the ignition of coal dust in the ventilation tunnel, after which the smoke spread throughout the mine.