Russia demands ‘concrete’ proof that it poisoned Navalny with dart frog toxin

Russia is demanding that European countries who accused Moscow of poisoning Kremlin critic Alexei Navalny with a dart frog toxin provide concrete data to support their allegation, according to Foreign Ministry spokeswoman Maria Zakharova. Britain, France, Germany, Sweden and the Netherlands said on Saturday that analyses of samples from Navalny’s body had confirmed the presence of epibatidine, a toxin found in poison dart frogs in South America and not found naturally in Russia. They said Moscow...