Alexey Popov from Kamensk-Shakhtinsky became a suspect under Part 2 of Art. 280 of the Criminal Code. On March 3, 2021, employees of the Federal Security Service of the Rostov Region as part of investigation of the case under Part 2 of Art.

Members of the Ukrainian youth community M.K.U were detained in Gelendzhik and Yaroslavl On March 19, 2021, the Federal Security Service announced that members of the Ukrainian youth radical community M.K.U ("Maniacs. The Cult of Killers", according to another version - "Youth Who Smiles") were detained.

Ravil Tukhvatulin was detained in Ufa. In March 2021, FSB officers of Bashkiria during a special operation detained a 60-year-old resident of Ufa, Ravil Tukhvatulin. He evaded serving a sentence for extremist statements online. Tukhvatulin was the head of the unregistered organization "Community Indigenous peoples of Rus' in the Ufa province. He distributed videos on the Internet with calls for the violent overthrow of power.

On March 19, 2021, the Supreme Court of the Republic of Altai satisfied the administrative claim of the prosecutor of the republic on the recognition of the interregional public movement "Siberian State Union" as an extremist organization. Members of the "Siberian State Union" used other names "Cathedral of Rus' of the Glorious Clans", "Slavic military brotherhood", "Siberian-Ukrainian movement", "Spiritual-Political Movement "Liberation".