(CNN) -- The U.S. and Russian ambassadors to the United Nations have exchanged a flurry of Twitter posts about the controversial punk rock band Pussy Riot. Meanwhile, Russian media suggested a Russian athlete in the Sochi Games may have been sporting an image supporting Pussy Riot on his snowboard Thursday in what could be the Olympics' first protest. In the diplomatic dispute, Samantha Power, the U.S. ambassador to the United Nations, apparently initiated the exchange with a Russian counterpart when she tweeted Wednesday about meeting formerly imprisoned band members Maria Alyokhina and Nadezhda Tolokonnikova, both of whom were released in December.
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U.S., Russian ambassadors to U.N. exchange words over Pussy Riot, prison conditions
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Three members of punk rock band Pussy Riot recently served Russian prison terms
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A Russian athlete has an apparent Pussy Riot image on his snowboard, agency says
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"Anything is possible," Winter Olympian says, adding, "I wasn't the designer"
Power posted a photograph of herself with the two punk rockers, who "came by to discuss their time in jail," @placeholder tweeted.