Novichok is the same nerve agent used in a 2018 attack in Britain on former KGB spy Sergei Skripal and his daughter, Yulia. A German government spokesman says the evidence is "without a doubt."
The Russian opposition figure has been in a medically induced coma since last week. He is in serious but stable condition, the Charité hospital in Berlin said on Friday.
Alexei Navalny, one of Russian President Vladimir Putin's most prominent critics, was poisoned by an unknown substance from a group of drugs that affect the nervous system, doctors say.
Doctors in Siberia reversed their initial decision, that it would be risky to move Russian opposition leader Alexei Navalny His family says Navalny was poisoned.
Navalny is unconscious and on a ventilator, according to his spokeswoman. The Vladimir Putin critic became ill during a commercial flight. His personal doctor wants him to be treated in Europe.
Alexei Navalny, a prominent critic of President Vladimir Putin, runs an anti-corruption organization that Russian authorities accuse of being a "foreign agent." This week, he hit back.
Lyubov Sobol's tenacity in standing up to the authorities, combined with a savvy use of social media, has put her at the center of attention as a new protest leader.