Police on Sunday detained protestors outside the Matrosskaya Tishina prison in Moscow, where jailed opposition leader Alexei Navalny is supposedly being held.
Demonstrations took place across Russia in support of Kremlin critic Alexei Navalny despite a crackdown by authorities.
Thousands turned up to support Russia's jailed opposition figure. Police detained hundreds and were filmed hitting protesters.
Russian police detained protesters in the far-eastern city of Vladivostok as multiple rallies were planned in support of Alexei Navalny across the country.
The opposition figure returned to Russia on Sunday five months after he arrived for treatment and convalescence in Germany for nerve agent poisoning.
Russian opposition leader Alexei Navalny says EU measures against Russian officials will only be taken seriously when they target oligarchs with close links to the Kremlin
The Russian president said he asked the country's Prosecutor General to immediately allow opposition figure Alexei Navalny to be moved to Germany for urgent treatment.
The opposition figure was in hospital in Berlin being treated for Novichok poisoning when Merkel came to the hospital for "a private meeting".
Navalny's flat and some of his bank accounts were frozen while he lay in a coma in Berlin, the Kremlin critic's spokeswoman said on Thursday.
In video posted on Instagram, Alexei Navalny, who was poisoned with Novichok, can be seen up and about and walking down stairs in the Berlin hospital where he is being treated.
Before being poisoned, Kremlin critic Alexei Navalny was urging Russians to vote tactically by casting their ballot for candidates best placed to defeat the ruling United Russia party.