Britain has accused Vladimir Putin of orchestrating the killing of opposition leader Alexei Navalny, claiming forensic analysis found a rare toxin from wild Ecuadorian dart frogs in his body. The UK says assassins acting for the Kremlin administered epibatidine inside a Siberian prison, calling it a state-level assassination with “no innocent explanation.” The findings were released just before the second anniversary of Navalny’s death, intensifying tensions with Moscow. Citing the case, British Prime Minister Keir Starmer warned Europe that Russia’s aggression remains a growing security threat.