The CEO of the mining company that operates the site said the accident was likely caused by the thawing of a “lens” — a localized underground pocket of ice or unstable rock.
At least 200 employees of the Russian-Chinese contractor Petro-Hehua marched through the city of Komsomolsk-na-Amure on Sunday, demanding back payments.
Parts of Kamchatka Peninsula have been buried under its heaviest snowfall in 60 years, as scientists say the winter blast could be due to climate change.