Siberia Coal-Mine Explosion Kills More Than 50

MOSCOW—Russian authorities opened a prison investigation into a suspected methane-gasoline explosion at a Siberian coal mine that killed much more than 50 persons and remaining dozens hospitalized, casting a spotlight on a vital sector for the state that in modern several years has been plagued with mishaps.

The specific circumstances of Thursday’s explosion at the Listvyazhnaya mine, in the Kemerovo location of southwestern Siberia, are still becoming investigated. But preliminary assessments found that poisonous fumes began to fill the ventilation stage in the mine some 820 toes underground and the personnel have been suffocated, investigators claimed.