Russian opposition leader Alexei Navalny's doctor says he was poisoned – video

Navalny's doctor says he has been poisoned and is in a coma. The Russian opposition activist collapsed during a flight to Moscow, forcing the pilot to make an emergency landing at Omsk airport, where Navalny was put on to a stretcher and taken to hospital.

• Russian activist Alexei Navalny in coma after suspected poisoning