Coal mining authorities say contact has been lost with 10 miners following an underground tremor and methane gas discharge at the Borynia-Zofiowka mine in southern Poland.
source https://www.seattletimes.com/business/10-miners-missing-after-tremor-at-2nd-coal-mine-in-poland/?utm_source=RSS&utm_medium=Referral&utm_campaign=RSS_technology
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