Russian opposition leader Navalny pronounced dead by prison authorities.

Alexei Navalny, a prominent opposition leader in Russia, has died while in prison in the Arctic Circle. Navalny was known for his strong criticism of President Vladimir Putin and was serving a 19-year jail term that many believed was politically motivated. He was transferred to a harsh Arctic penal colony late last year. According to the prison service, Navalny fell ill after a walk on Friday and quickly lost consciousness. Despite efforts to resuscitate him, he could not be saved. The cause of his death is still being determined. Navalny's lawyer has not yet commented on the news, but a close aide expressed suspicion about the circumstances surrounding his death. Further updates on this story will follow.