Chairman of conglomerate Sistema Vladimir Yevtushenkov attends the St. Petersburg International Economic Forum 2014 (SPIEF 2014) in St. Petersburg in this May 23, 2014 file photo. Russian investigators said on September 16, 2014, they had placed Yevtushenkov under house arrest, accusing him of money-laundering in connection with the acquisition of shares in oil producer Bashneft. Picture taken May 23, 2014. REUTERS/Sergei Karpukhin/Files