Russian Opposition Leader Alexei Navalny Likely Died From Blood Clot: Ukrainian Spy Chief

‘I may disappoint you, but as far as we know, he indeed died as a result of a blood clot,’ the spy chief said.

A man holds a portrait of Kremlin critic Alexei Navalny during a vigil at Rome's city hall, on Feb. 19, 2024. Filippo Monteforte/AFP via Getty Images

Ukraine’s intelligence chief said on Sunday that Russian opposition leader Alexei Navalny most likely died of a blood clot, amid speculation that he was assassinated while in prison.

Mr. Navalny, 47, has been the most prominent critic of Russian President Vladimir Putin’s government over the past decade. He collapsed and died in a Siberian prison camp on Feb. 16, according to Russian officials.