Doctor who treated Navalny in Russia suddenly died

Sergei Maximishin, the deputy chief physician at the clinic in Omsk, Siberia, has died "suddenly" at the age of 55. The hospital's administration said so "with regret" in an official statement, U.S. broadcaster CNN reported. No details were given on the cause of death.

The hospital treated Alexei Navalny last summer immediately after he was poisoned. The Kremlin critic had collapsed on a flight from Tomsk, Siberia, to Moscow in late August. Initially, he was then treated at the hospital in Omsk after an emergency landing of the plane. Two days later, still in a coma, he was taken to Berlin's Charité University Hospital for treatment.