Yulia Navalnaya, widow of Russian opposition leader Alexei Navalny, walks away from his picture after lighting a candle at the end of a service in St. Mary's Church on the occasion of his birthday, in Berlin, June 4, 2024. Sebastian Christoph Gollnow/AP

The widow of Alexei Navalny said Wednesday that two independent labs have found that her husband was poisoned shortly before his death in a Russian prison.

Navalny, who crusaded against official corruption and staged massive anti-Kremlin protests as President Vladimir Putin's fiercest foe, died in the Arctic penal colony in February 2024. He was serving a 19-year sentence that he believed was politically motivated.

Authorities said the politician became ill after a walk but have otherwise given few details on his death. He was 47.

In a video released Wednesday, Yulia Navalnaya said biological samples from Navalny's body had been taken out of Russia and tested at two laboratories abroad. She said both laboratories concluded that Navalny had been poisoned, but had not released their findings due to "political considerations." She did not provide proof or elaborate on what the alleged poison was.

"These labs in two different countries reached the same conclusion: Alexei was killed. More specifically, he was poisoned," Navalnaya said in the video, which was posted on social media. In the clip, she questioned the lack of video footage from the prison and showed images purported to be of Navalny's cell on the day of his death showing vomit on the floor. She did not provide direct proof that Navalny had been poisoned or that it had been carried out by prison authorities.


"I demand that the laboratories that conducted the research publish their results," she said. "Stop appeasing Putin for some higher 'considerations.' You cannot placate him. While you stay silent, he does not stop," Navalnaya said.

Navalnaya has repeatedly blamed Putin for Navalny's death, something Russian officials have vehemently denied.

In a press conference Wednesday, Kremlin spokesperson Dmitry Peskov said he was not aware of Navalnaya's statement and said that he could not comment.

Navalnaya said in August 2024 that she was told by Russian investigators that Navalny died from a combination of "a dozen different diseases" and that he finally succumbed to arrhythmia, or an irregular heartbeat.

Navalnaya disputed Russian officials' version of events and said her husband exhibited no instances of heart disease while alive.

Navalny previously suffered from another poisoning in 2020, when the opposition leader fell sick on an internal flight in Russia. He was flown to Berlin while still in a coma for treatment two days later. Labs in Germany, France and Sweden, and tests by the Organization for the Prohibition of Chemical Weapons, established that he was exposed to the Soviet-era Novichok nerve agent.

Russian authorities have denied any involvement in the incident, a claim that Navalny challenged as false.

While behind bars, Navalny completed a memoir, documenting his three-year battle to survive the harsh prison conditions. Last summer, a Russian court issued an arrest warrant for his wife. She told "60 Minutes" that the memoir, "Patriot," represents his final act of defiance.

"It was his life. It was his every-minute job to fight with Putin's regime," Yulia Navalnaya told correspondent Lesley Stahl. "I would prefer he would fight not from the grave."

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