The spokesman of the Russian Investigative Committee Vladimir Markin told news agencies that a criminal probe was being opened into neglect of air transport rules.

俄联邦调查委员会发言人Vladimir Mark in对新闻界说一项忽视航空运输规则的犯罪调查已经展开。

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Investigative Committee spokesman Vladimir Markin said Mr Serdyukov would be questioned in the probe "if there is a reason" for doing so.

BBC: Russian Defence Minister Anatoly Serdyukov fired by Putin

This report quoted Russian Investigative Committee spokesman Vladimir Markin as saying "there were no mass water releases or overflow over the dam" from the Neberdzhayevskoye Reservoir.

CNN: July 9, 2012 -- Updated 0150 GMT (0950 HKT)

"Our best forces are now involved in the investigation, which is being supervised by the highest-ranking officials, " said Vladimir Markin, spokesman of the Investigative Committee of the Prosecutor-General's Office.

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