Britain blames Russia for poisoning Alexei Navalny with dart frog toxin

Britain has blamed the Kremlin for killing opposition leader Alexei Navalny, which it said was likely done using a poison developed from a dart frog toxin.Two years on from the death of Mr Navalny at a Siberian penal colony, the UK and its allies have pinned the blame on the Russian state following analysis of material samples found on his body.The Russian authorities have previously strenuously denied any involvement in his death.