With Navalny's death, democracy lost one of its leaders in modern times, Minister of Interior, Kalin Stoyanov, said on the death of Kremlin critic Alexei Navalny on February 16.
Earlier today, Russian opposition leader Alexei Navalny died in prison.
Russia's Investigative Committee has launched a probe into the facts of the 47-year-old Russian opposition leader's death.
Navalny died after fainting and losing consciousness in a penal colony north of the Polar Circle where he was serving a sentence, authorities in Russia said.