(FILES) Opposition leader Alexei Navalny appears on a screen set up at a courtroom of the Moscow City Court via a video link from his prison colony during a hearing of an appeal against his nine-year prison sentence he was handed in March after being found guilty of embezzlement and contempt of court, in Moscow on May 24, 2022. The allies of jailed Russian opposition leader Alexei Navalny said on December 11, 2023 they had been unable to locate him for six days, and that he had likely been transferred. Navalny is serving a 19-year prison sentence on extremism charges and a court this summer ordered to move him to a harsher "special regime" prison colony. (Photo by Alexander NEMENOV / AFP)