Five Miners Lost in Poland Coal Mine After Tremor

Five miners are lost in a coal mine in Poland after a tremor struck.

Two men were found, crews lost contact with the others.

The mine is owned by JSW, the biggest coking coal producer in the European Union.

Poland's State Mining Authority said the tremor had a magnitude of 3.4 on the Richter scale Coal mining is a major industry in Poland.

It is also a dangerous one. This year alone four miners have been killed in accidents in separate mines. Methane gas has led to a number of deadly explosions and cave-ins.

Jastrzębska Spółka Węglowa S.A. produces around 12 million tonnes of coal every year. The company has proven recoverable reserves of 503.4 million tonnes of coal.