Russian opposition leader Alexei Navalny has arrived in Germany from Siberia for treatment.
The acutely ill critic of President Putin is in a coma after drinking what his supporters suspect he was poisoned.
Doctors treating him in Omsk had insisted on Friday that he was too ill to be moved. But they later said his condition was stable enough for the flight. His wife Yulia is travelling with him.
Mr. Navalny was airlifted in a medical evacuation flight funded by the German non-governmental organisation Cinema for Peace. He is now being treated in Berlin’s Charité hospital.
Mr Navalny’s personal doctor, Anastasia Vasilieva, was not allowed to see him while he was in hospital in Russia.
Medical staff treating Mr Navalny at the hospital in Omsk said before his flight that his life was not in immediate danger.
Mr Navalny’s spokeswoman, Kira Yarmysh, earlier tweeted: “Massive thanks to everyone for their support. The struggle for Alexei’s life and health is just beginning.”
Mr Navalny fell ill during a flight from Tomsk to Moscow on Thursday, and his plane made an emergency landing in Omsk.
A photograph on social media appeared to show him drinking from a cup at a Tomsk airport cafe before the flight. His team suspects a poisonous substance was put in his tea.