FILE - Russian opposition leader Alexei Navalny appears on a video link from prison provided by the Russian Federal Penitentiary Service at Moscow City Court, Tuesday, May 24, 2022. Allies of imprisoned opposition politician Alexei Navalny say the Kremlin critic is missing from the prison where he has been serving his time. Most likely he is being transferred to another prison, his close associates say, but in Russia prison transfers take days, if not weeks, and are shrouded in secrecy, prompting concerns about Navalny's safety. (AP Photo/Alexander Zemlianichenko, File)

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