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Cherkasov, a 42-year-old Russian national, was named on March 5 in a decree seeking his arrest, Hermitage said in a statement today. Russian Interior Ministry officials visited Cherkasovâ??s former home in Moscow seeking his arrest on March 24, the company said. While Cherkasov has worked from London since 2006, a Russian domestic arrest warrant would be the first step in trying to extradite him from the U.K.