What is the dart frog toxin allegedly used to kill Alexei Navalny? BBCRussian opposition leader Alexei Navalny was poisoned by deadly ‘dart frog’ toxin, Europeans say NBC NewsRussian opposition figure Navalny killed by toxin found in poison dart frogs, Europeans say CNNRubio says US does not dispute Navalny poisoning assessment by Europeans ReutersNavalny Was Poisoned With Frog Toxin, European Governments Say The New York Times
