Mourners gathered in Moscow Monday to mark two years since the death in custody 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.

In a joint statement, the foreign ministries of the U.K., France, Germany, Sweden and the Netherlands say Navalny was poisoned by Russia with a lethal toxin derived from the skin of poison dart frogs.

Analysis in European labs "conclusively confirmed" that Russian opposition leader Alexei Navalny was poisoned by the Kremlin with a lethal dart frog toxin, the foreign ministries of five European ...

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

Family members and representatives from several European embassies paid their respects.

Add Yahoo as a preferred source to see more of our stories on Google. Two years after Russian opposition leader Alexei Navalny’s death, European officials say new evidence confirms he was poisoned ...

LONDON (AP) — Russian opposition leader Alexei Navalny was poisoned by the Kremlin with a lethal toxin derived from the skin of poison dart frogs, five European countries said Saturday. The foreign ...