Billionaire Russian businessman Suleiman Kerimov was put under formal investigation on Wednesday in Nice in southern France on suspicions of laundering tax fraud proceeds, Nice prosecutor Jean-Michel Pretre said.
Tycoon Suleiman Kerimov watches a soccer match between Anzhi and Spartak in Moscow on April 22, 2012.
Moscow summoned a senior French diplomat on Monday over the arrest of Russian oligarch and senator Suleyman Kerimov in Nice in connection to a tax evasion case.
French police arrested Kerimov at Nice airport on Monday evening.
He has now been released under strict conditions including handing over his passport and posting bail of five million euros.
There was "no doubt" efforts to help Kerimov would continue, Peskov added.
Image A villa owned by Mr Kerimov in Cap d'Antibe in southeastern France
The source added Kerimov would be held in custody for at least another 24 hours.
His family now controls Russia's largest gold producer, Polyus.
Forbes Magazine ranks Kerimov as Russia's 21st richest businessman with a fortune of United States dollars 6.6 billion.
Until a year ago, he owned the football club, Anzhi Makhachkala, which became famous for big-money signings of stars including the Cameroonian striker, Samuel Eto'o.
Since 2008, he represents Dagestan as a senator in the Federation Council, the upper house of Russia's parliament.
A French judicial source said Kerimov faces accusations of purchasing several luxury homes on the French Riviera using shell companies, which would have enabled him to reduce his tax obligations to France.
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