Poisoning of Alexei Navalny
On 20 August 2020, Russian opposition leader and anti-corruption activist Alexei Navalny was poisoned with the Novichok nerve agent and as a result, he was hospitalized in serious condition. During a flight from Tomsk to Moscow, he became ill and was taken to a hospital in Omsk after an emergency landing.
Source: Wikipedia — Poisoning of Alexei Navalny (CC BY-SA 4.0)