Sergei Mamaev
Yoshkar-Ola
45 yr old (born in 11.03.1980)
Address: 424000, Россия, респ. Марий Эл, г. Йошкар-Ола, ул. Советская, д. 100, ФКУ СИЗО-1 УФСИН России по Республике Марий Эл, Мамаев Сергей Олегович, 1980 г.р.
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An activist from Yoshkar-Ola. On July 22, 2025, he reported his detention related to a case of an extremist organisation in connection with the activities of Navalny Headquarters. The next day he was placed into custody. The reason for the prosecution was apparently his posts and participation in events dedicated to Navalny.
You can read more about politically persecuted people in the Telegram channel OVD-Info LIVE and our database of politically motivated criminal prosecutions.
Sergei Mamaev
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Address: 424000, Россия, респ. Марий Эл, г. Йошкар-Ола, ул. Советская, д. 100, ФКУ СИЗО-1 УФСИН России по Республике Марий Эл, Мамаев Сергей Олегович, 1980 г.р.
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