MOSCOW—Jailed Russian opposition politician Alexei Navalny on Tuesday confirmed his arrival at what he described as a snow-swept prison above the Arctic Circle and said he was in excellent spirits despite a tiring 20-day journey to get there.
Mr. Navalny posted an update on X via his lawyers after his allies lost touch with him for more than two weeks while he was in transit with no information about where he was being taken, prompting expressions of concern from Western politicians.