Russian opposition leader Alexei Navalny was poisoned by the Kremlin with a rare and lethal toxin found in the skin of poison dart frogs, five European countries s ...

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There is no innocent explanation for the presence of the toxin detected after Navalny's death, European allies say, noting ...

The allegation feeds into a long history of high-profile poisonings in Russia, many targeting foes of President Vladimir Putin.

Poison dart frogs have fascinated researchers. Now their toxin has allegedly been linked to the death of Russian opposition leader Alexei Navalny.

Toxin found in poison dart frogs probably killed Alexei Navalny in a Russian prison, five countries announced on the two-year anniversary of his death.

Dart frogs in captivity do not produce the toxin, and it is not found naturally in Russia, five European governments said.

Alexei Navalny died of poison epibatidine, which comes from a dart frog not native to Russia, five European countries allege in a news statement. Nalany, a longtime critic and political opponent of ...

Russian opposition leader Alexei Navalny was poisoned by the Kremlin with a lethal toxin derived from the skin of poison dart ...

Alexei Navalny, the Russian opposition leader, died from a 'dart frog toxin,' the UK Foreign Office announced.