The Foreign Office has blamed the Russian state for the death of opposition leader Alexei Navalny, which it said was the result of poisoning from a dart frog toxin.
Russian opposition leader Alexei Navalny was killed by the Russian state, the Foreign Office has revealed.
Navalny's death was the result of poison from a South American dart frog toxin called epibatidine.
The politician died aged 47 while in a remot... [8649 chars]