Protests, poisoning and prison: The life of Alexei Navalny and his opposition to Vladimir Putin - Alexei Navalny was a fierce critic of Russian president Vladimir Putin

Russian opposition leader Alexei Navalny was poisoned by the Kremlin with a lethal toxin derived from the skin of poison dart frogs, five European countries said Saturday.

The foreign ministries of the U.K., France, Germany, Sweden and the Netherlands said analysis of samples taken from Navalny’s body “conclusively confirmed the presence of epibatidine.”