The Putin critic and Russian opposition leader is recovering in Germany after being poisoned in Russia by the Soviet-era nerve agent.
Supporters of Alexei Navalny have insisted that the attack against the Kremlin critic could have only been ordered at the top levels.
Vladimir Putin has vehemently denied any involvement in the Navalny poisoning case.
Navalny, a politician and corruption investigator who is Putin’s fiercest critic, was flown to Germany two days after falling ill on August 20 on a domestic flight in Russia.
He spent 32 days in the hospital, 24 of them in intensive care before doctors deemed his condition had improved sufficiently for him to be discharged.
He has posted frequent comments online as his recovery has progressed, but in his first interview since the attack, he told Germany's Der Spiegel magazine that in his mind, “Vladimir Putin was behind the attack,” in a German translation of his comments.
“I don't have any other versions of how the crime was committed," he said in a brief excerpt of the interview conducted in Berlin on Wednesday and to be released in full online later Thursday.