According to the press service of the party, Zubrilin was detained when he was riding the subway after a rally in support of the annexation of the DPR, LPR, Kherson and Zaporozhye regions to Russia.
The party said that Zubrilin was stopped at the Okhotny Ryad metro station.
“For forty minutes they were kept in the police department in the subway, now they are being taken to the Kitai-Gorod police department,” RIA Novosti quotes the message.
Earlier, a festive rally-concert was held in Moscow dedicated to the results of the referenda on the entry of the Donetsk and Lugansk People's Republics, as well as the Kherson and Zaporozhye regions into Russia.
RT was broadcasting live.