(FILES) Jailed Russian opposition figure Alexei Navalny is seen on a screen via a video link from his penal colony during court hearings over the extremism criminal case against him at the Russia's Supreme Court in Moscow on June 22, 2023. 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 Natalia KOLESNIKOVA / AFP)