Russian opposition leader Alexei Navalny collapsed on a Tomsk-to-Moscow flight on 20 August 2020 and was evacuated to the Charité hospital in Berlin, where doctors confirmed poisoning by a novichok-class cholinesterase inhibitor. OPCW laboratories and independent German, French, and Swedish labs confirmed the finding. Bellingcat and the Insider published an investigation identifying an FSB team that had surveilled Navalny for years; a phone-call recording in which FSB officer Konstantin Kudryavtsev described the underwear contamination route went viral. Russia denied all involvement and refused to open a criminal investigation.