During the unauthorized
demonstration, 311 people were arrested, said OVD-info. However Russia's Ministry of Interior put the number of detainees much lower, at 30, and said that only 350 people had taken part in the protests.
Among those arrested was prominent activist Lyubov Sobol, an ally of high-profile opposition leader
Alexei Navalny. She was shown being removed from a taxi and bundled into a van by police moments before the demonstration started, in Reuters footage.
It is the latest in weeks of protests against independent and opposition candidates being barred from the ballot in municipal elections scheduled for September.