MOSCOW—A plane carrying opposition politician Alexei Navalny, who was in a coma in a Siberian medical center right after suddenly slipping sick, landed in Germany in which he is intended to undergo procedure right after disputes above his situation and no matter whether he was secure sufficient to travel.

“The plane with Alexei just landed in Berlin,” his spokeswoman, Kira Yarmysh, tweeted early Saturday early morning. “The battle for Alexei’s lifestyle and health and fitness is just beginning, and there is continue to a whole lot to go by means of, but now at the very least the first stage has been taken.”