Hearings on whether to jail outspoken Kremlin critic Aleksei Navalny have been postponed until May.
The hearings were initially scheduled to start April 23, but Moscow's Lyublino District Court postponed them to May 13 after it learned that Navalny had not received a subpoena.
Navalny is serving two suspended sentences following convictions on theft and embezzlement charges that he calls politically motivated.
The hearings will determine whether a suspended 5-year sentence that Navalny received in 2013 should be replaced by a real prison term because of a finding by the Federal Penitentiary Service that Navalny's political activities amount to a "systematic disturbance of public order."
Navalny's recent efforts have been aimed at uniting Russia's disjointed array of opposition parties ahead of Russia's 2016 parliamentary elections.
Last week, Navalny and his Party of Progress joined ranks with the political party of slain Kremlin critic Boris Nemtsov in a bid to form a democratic alliance and overcome years of bickering.