U.S. sanctions Russian oligarch Potanin and Rosbank -Treasury Dept. website

Vladimir Potanin, co-owner of Norilsk Nickel, attends an agreement signing ceremony with the Krasnoyarsk region's government, in Moscow, Russia December 12, 2017. REUTERS/Sergei Karpukhin/File Photo

WASHINGTON, Dec 15 (Reuters) - The United States imposed sanctions on one of Russia's richest men, Vladimir Potanin, and Russian commercia bank Rosbank, according to the Treasury Department website.

Rosbank was purchased earlier this year by Interros, an investment holding company Potanin controls.

Reporting by Doina Chiacu;

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