A worker was killed and two others injured when Nyrstar’s Immel Minean underground zinc mine collapsed in Knoxville County, Tennessee, according to authorities.
The injured workers were hospitalized with at least one requiring surgery. The cause of the collapse was unknown. This was the third death at one of the company's Tennessee mines this year. An investigation was underway.
The mine was cited three times by the Mine Safety and Health Administration (MSHA) for safety violations in July.
Nyrstar is a Dutch company with mining and smelting operations in Europe and the US. It has a processing plant and three underground zinc mines in Tennessee.