Russian opposition politician Alexei Navalny is in coma after falling ill from suspected poisoning on Thursday. He started feeling unwell while on a return flight to Moscow from the Siberian city of Tomsk. According to his spokesperson, Alexey was poisoned with something mixed into the tea that he drank in the morning. If confirmed, the 44-year-old won’t be the first prominent person to be a target of toxic attack. A look at some high-profile poisonings or attempted poisonings of politicians, dissidents or spies in recent times.

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