The trial of Alexey Navalny was postponed on Tuesday, one day after his team said it had lost contact with the jailed Russian opposition leader, who was believed to be imprisoned in a penal colony about 150 miles east of Moscow.

Concern was sparked on Monday after spokesperson Kira Yarmysh put out several social media posts, highlighting that her team had lost contact with Navalny, who was supposedly being held in the IK-6 penal colony.

The spokesperson for Navalny, who was jailed for 19 years on extremism charges in August in addition to a previous sentence, cited a prison employee who claimed the 47-year-old had “left their colony” but still could not confirm his whereabouts on Tuesday.

Ivan Zhdanov, the director of Navalny’s Anti-Corruption Foundation, said in a post on X that the politician’s trial was postponed again on Tuesday. When the judge asked a question regarding Navalny’s whereabouts, he was redirected to the Federal Penitentiary service, Zhdanov said.

Navalny was found guilty this year of creating an extremist community, financing extremist activities and numerous other crimes. He was already serving sentences of totaling 11-and-a-half years in a maximum security facility on fraud and other charges, all of which he denies.

Alexey Navalny fails to attend trial after his lawyer loses contact with jailed Russian opposition leader | CNN