In February 2016, a series of explosions caused the deaths of 36 people, including 31 miners and five rescue workers, at the Severnaya coal mine 10 kilometres north of the city of Vorkuta, Komi Republic, Russia. The explosions were believed to be caused by ignition of leaking methane gas. It is the second deadliest mining disaster of the 2010s behind the Soma mine disaster, and fourth deadliest of the 21st century thus far.