Hecla Mining Company (NYSE:HL) shares fell 10% to $4.12 on Monday after the biggest US silver miner revealed that production and cost guidance at its Lucky Friday mine in Idaho will be impacted after operations were suspended following a "fall of ground" incident, which involves a collapse of a part of the mine shaft or tunnel roofs or walls crumbling.
The company stated that it was working on a plan to resume production and would update its 2023 outlook once that happens.
It added that the failure appears to be caused by a fire that is contained and under control and no personnel were in the mine at the time.
Shares of Hecla Mining are down 28% year to date.
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