American basketball player Brittney Griner, jailed in Russia in what the U.S. calls a wrongful detention, is being moved to a penal colony, her attorneys said Wednesday.More from NBC News:- Republicans try to allay concerns about U.S. aid to Ukraine ahead of Election Day- Russian officials on the defensive after letter alleging 'incomprehensible' losses in Ukraine- Timothy Griffin of New York state is killed fighting Russians in UkraineGriner pleaded guilty in July but said she'd packed hurriedly for a flight and brought the canisters to Russia unintentionally."As we work through this very difficult phase of not knowing exactly where BG is or how she is doing, we ask for the public's support in continuing to write letters and express their love and care for her."The U.S. has proposed an exchange for Griner and another American jailed in Russia, Paul Whelan, for a convicted Russian arms dealer imprisoned in the U.S., Viktor Bout, sources have said."In the subsequent weeks, despite a lack of good faith negotiation by the Russians, the U.S. Government has continued to follow up on that offer and propose alternative potential ways forward with the Russians through all available channels," she said."