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MOSCOW, July 17 (Reuters) - Two miners were missing and athird trapped underground in an Arctic Russian mine after anaccident at a coal face, the owner, a unit of steelmakerSeverstal , said on Sunday.

The Severstal unit, Vorkutaugol christian louboutin sneakers for men , said the collapse wascaused by a "geological phenomenon".

Russia, a major producer of thermal coal and coking coal forthe steel industry, suffers regular mine accidents, often due toshoddy adherence to safety procedures.

Russia's creaky infrastructure, negligence and rampantcorruption and were in the spotlight this week following theworst river accident in three decades, when a tourist boat sunkon the Volga killing up to 129 people.

Of 79 miners who were in the pit at Severny christian louboutin sneakers for men NFL Jerseys when a methane explosion caused it to collapse, near thenorthern city of Vorkuta, when the accident occurred, threeremained underground.

One of the miners was located quickly and was receivingsupplies of oxygen christian louboutin sneakers for men , the company said. Russian news agencies saidrescuers were struggling to reach him through about 3-5 metresof rock. The other two could not be found.

The last major fatal accident occured at the Raspadskaya mine in Kemerovo in western Siberia last year, when amethane explosion caused it to collapse christian louboutin sneakers for men , killing at least 66people.

(Writing by Melissa Akin; Editing by Elizabeth Fullerton)