Attempts to rescue four Russian coal miners trapped underground are continuing, after an explosion killed 106 people at a Siberian pit on Monday.Some 93 people were rescued from the mine, which was devastated by a methane explosion.
It was one of the worst disasters in a decade in Russia's mining industry, which has a notorious safety record.
However, the mine in question was only built a few years ago and had just had a new safety system installed.
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