Icon: enlarge
Navalny was treated in this clinic in Omsk
Photo: Alexei Petrov / imago images / ITAR-TASS
Sergei Maximischin, the deputy head physician at the clinic in Omsk, Siberia, "suddenly" died at the age of 55.
The hospital administration announced this "with regret" in an official statement, reports the US broadcaster CNN.
No information was given on the cause of death.
Alexei Navalny was treated at the hospital last summer immediately after being poisoned.
The Kremlin critic collapsed on a flight from Tomsk in Siberia to Moscow in late August.
At first he was treated in the hospital in Omsk after the plane crashed.
Two days later, while still in a coma, he was brought to the Charité University Hospital in Berlin for treatment.
Leonid Volkov, a close confidante of Navalny, confirmed in the CNN report that Maximischin headed the department that dealt with the Kremlin critic.
Alexander Murachowski, the clinic's chief physician, was promoted last fall.
He was promoted to head of the regional health ministry.
Murachowski had ruled out that Navalny would be poisoned and refused to leave for Germany.
Navalny in court again
Navalny was arrested at Moscow's Sheremetyevo airport on January 17, immediately after his return from Germany.
On Tuesday, the Russian opposition leader was sentenced to several years in a prison camp in a court case criticized in Western countries for allegedly violating probation conditions in previous criminal proceedings.
On Friday, Navalny will be on trial again for defamation of a World War II veteran.
The Russian judiciary accuses the 44-year-old of making “untrue” and “insulting” statements about a World War II veteran.
This had spoken out in a video for the constitutional referendum of Russia's President Vladimir Putin.
Navalny had published the video on Twitter and described the veteran and other actors as a “shame for the country”, “people without a conscience” and “traitors”.
If convicted, he could face a fine of up to five million rubles (56,000 euros) and up to five years in prison.
Icon: The mirror
when
