Colleagues of Russian opposition leader Alexei Navalny say the nerve agent used to poison the Kremlin critic was detected on an empty water bottle from his hotel room, suggesting he was poisoned there and not at the airport as first thought. Navalny fell violently ill on a flight in Russia last month and was airlifted to Berlin for treatment. Laboratories in Germany, France and Sweden have established he was poisoned by a Novichok nerve agent, though Russia denies this and says it has seen no evidence.
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