About 15 people were detained by OMON officers during a funeral march in Moscow. On the air of the Dozhd TV channel, a participant in the march said that they were "activists of the national revolutionary bloc, the Narodnaya Volya organization." Perhaps the riot police did not like the black flags.
UPD (17:30): The exact number of detainees is 11. It is still unknown which police station they are being taken to.
UPD (17:47): According to the latest data, 13 Narodnaya Volya activists were detained, one of them was beaten. They are currently on the bus. According to some reports, they were detained for obscene language, which formally falls under Art. 20.1 of the Code of Administrative Offenses (petty hooliganism).