The death toll from a toxic gas leak at a coal mine in Russia has risen to more than 50.
According to the foreign news agency, the death toll from a toxic gas leak at a coal mine in Siberia has risen to 52, and the latest tragedy is being called the worst coal mine incident in Russia since the collapse of the Soviet Union.
According to media reports, six rescue workers were also killed in the incident at the coal mine. The head of the navigation agency said three officials, including the owner of the mine, had been arrested on suspicion of inadequate arrangements and an investigation into the crash had been launched.