Russian opposition leader Alexei Navalny was admitted to hospital in Siberia on Thursday suffering symptoms of what his spokeswoman called poisoning, after his aircraft made an emergency landing.
Navalny, 44, is unconscious and in intensive care after he started feeling unwell on a flight returning to Moscow, the capital, from the Siberian city of Tomsk, said Kira Yarmysh, the spokeswoman.
After the plane landed in Omsk, Navalny was taken to hospital with suspected poisoning, she added on social media, such as Twitter and Telegram.