Prague - Two Polish miners died and three were slightly injured when a coal mine in north-eastern Czech Republic in which they were working suffered a seismic movement, the mining company's owner said Sunday.
The movement occurred before midnight Saturday as 21 Polish miners were extracting coal in the underground mine, which belongs to the country's largest mining company OKD, said Vladimir Bystrov, a spokesman for OKD's parent company New World Resources.
The causes of the jolt were not immediately known and an investigation was under way, Bystrov said.
The dead miners, aged 39 and 46, were the first earth-tremor victims in OKD's mines this year, he said. Five other people had so far died in the firm's mines in 2008.