According to Mining News Pro - The State-run OKD company said a methane blast more than 800 m underground devastated areas of the CSM hard-coal mine, near the town of Karvina, on Thursday.

An OKD spokesman was not immediately available for comment.

The previously reported death toll was five and eight unacccounted for. The company said most of the victims and injured were Polish miners provided by the ALPEX company.

http://www.miningnewspro.com/en/News/317405/Czech coal mine blast toll rises to 13