Russian human rights group OVD-Info has said 58 people have been detained during the current demonstration on central Moscow's Manezhnaya Square against Thursday's conviction of opposition leader Alexei Navalny.
No comments on OVD-Info's statistics have come from law enforcement.
The demonstration was not permitted by the authorities.
More than 2,000 supporters of opposition activist Alexei Navalny are holding an unsanctioned protest in the center of Moscow, a city police representative told Interfax.
"According to the Moscow police estimates, approximately 2,500 people have gathered in the center of the city, around Revolutsii Square. The police have officially warned them [the protesters] they will be detained and face charges if they break public peace," he said.
Meanwhile, Yabloko opposition party leader Sergei Mitrokhin told Interfax the protest against the sentencing of Navalny attracted about 10,000 people.
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