BERLIN (AP) — The Berlin hospital treating poisoned Russian opposition leader Alexei Navalny says his condition has improved further and he is now able to leave his bed briefly. The Charite hospital said Monday that Navalny “has been successfully removed from mechanical ventilation.” Earlier, the German government said specialist labs in France and Sweden have confirmed that Navalny was poisoned with the Soviet-era nerve agent Novichok. The 44-year-old Navalny, the most prominent opponent of Russian President Vladimir Putin, fell ill on a Russian flight on Aug. 20. He was transferred two days later for treatment in Germany. The Kremlin on Monday dismissed what it called “unfounded accusations” against Russia over Navalny’s poisoning.