He stated this at a press conference following talks with his Iranian counterpart Mohammad Javad Zarif.
Lavrov noted that the Russian side hears public comments, including officials from the Federal Republic of Germany, "who say rather absurd things."
"For example, the thesis that everything that happened to Navalny happened on the territory of Russia, so we will not help you with anything, sort it out yourself, but we demand that you admit that you are to blame," the minister said.
He also said that representatives of Russia "a week and a half ago" officially requested the German authorities for consular access to Navalny, but did not receive a response to this appeal.
Earlier, Lavrov announced the refusal of the Federal Republic of Germany and the OPCW to respond to inquiries about Navalny.