A Russian court has extended the pre-trial detention of two lawyers who represented the late Kremlin critic Alexei Navalny, the independent news website Mediazona reported Tuesday. Vadim Kobzev, Alexei Lipster, and Igor Sergunin were arrested last October on accusations of participating in “extremist” activities for passing Navalny’s letters on to his associates. Russia in 2021 outlawed Navalny’s political network as “extremist,” putting his associates at risk of criminal prosecution. Moscow’s Basmanny District Court ruled Tuesday to extend Kobzev and Liptser’s pre-trial detention until Aug. 3…