Russian authorities refuse to open criminal investigation into Navalny's death, his widow says

FILE - Russian opposition leader Alexei Navalny and his wife Yulia attend a meeting where he was nominated for the presidential election race, in Moscow, Russia, Dec. 24, 2017. (AP Photo/Pavel Golovkin, File)

Russian authorities have refused to open a criminal investigation into the death of opposition leader Alexei Navalny who died in an Arctic penal colony, his widow Yulia said Thursday.

Navalny, the fiercest political foe of Russian President , died in February in the remote northern prison colony while serving a that he had condemned as politically motivated. Authorities said he became ill after a walk but have otherwise given no details on Navalny鈥檚 death.

Russian officials only said that Navalny died of natural causes shortly after taking a walk and have vehemently denied involvement both in the poisoning and in his death.

In a video published Thursday on social media, Yulia Navalnaya, Navalny's widow, said she received a letter from Russian investigators detailing the cause of her husband's death.

In the video, Navalnaya said she was told Navalny died from a combination of 鈥渁 dozen different diseases." Investigators told her Navalny finally died from arrhythmia, or an irregular heartbeat.

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

The letter, Navalnaya said, was 鈥渁 lie.鈥

鈥淭hey are hiding what really happened that day ... when Alexei became ill, he was not taken to the medical unit, but back to the punishment cell.鈥

There, she said, Navalny was 鈥渄ying alone."

The document said officials would not open a criminal investigation into the opposition leader's death because no offense had been committed, Navalnaya said.

鈥淎s long as Putin is in power, there will be no investigation,鈥 Navalnaya said, vowing to continue to probe the circumstances around her husband's death.

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