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Police officer assists a man who was injured during clashes between demonstrators and police in the center of Moscow, Russia, Saturday, July 27, 2019. Russian police clashed with demonstrators and have arrested some hundreds in central Moscow during a protest demanding that opposition candidates be allowed to run for the Moscow city council.

Police officers detain a man during an unsanctioned rally in the center of Moscow, Russia, Saturday, July 27, 2019. Russian police are wrestling with demonstrators and have arrested hundreds in central Moscow during a protest demanding that opposition candidates be allowed to run for the Moscow city council.

Russian riot police detain a participant during a opposition protest in front of Moscow Mayor's office.

Police officers detain a woman during an unsanctioned rally in the center of Moscow, Russia, Saturday, July 27, 2019. Russian police clashed with demonstrators and have arrested some hundreds in central Moscow during a protest demanding that opposition candidates be allowed to run for the Moscow city council.

Riot police in Moscow clashed with about 3,500 protesters who took to the streets after authorities barred dozens of opposition candidates from upcoming local elections in the Russian capital.

Cops arrested more than 800 at the demonstration, which was called by Alexei Navalny, a jailed opposition activist and a leading critic of Russian premier Vladimir Putin, according to TV Rain, an independent news channel on YouTube.

This after electoral commission authorities banned 30 candidates from participating in elections called for Sept. 8.

Officials said that the candidates failed to collect the requisite 5,000 signatures on petitions allowing them to run for local office.

The candidates argued that the measures were too stringent since signing any petition supporting a Putin opponent puts citizens at risk of arrest.

Local police claimed only 174 were arrested.