"Counterintelligence believes that these cells are supervised from abroad, in particular, with the participation of the SBU and an organization that was previously called the Navalny Headquarters*, and has now turned into secret radical brigades," the source told RT.

According to him, all participants in the lists of the so-called "Smart Voting" - a project created by FBK ** to distribute votes among disparate opposition candidates - were checked.

The supporters of the UG showed the greatest activity during the elections to the State Duma in 2021. Subsequently, the database with their personal data was stolen and posted on the public. Later, the main persons of the FBK admitted that the leak of the UG list was caused by their shortcomings.

"The lion's share of the characters from this list passes with the official mark "extremism," says the interlocutor of RT. "This means that although a person has not committed a crime of an extremist nature or it has not been proven, he, nevertheless, is noticed in activity contrary to the law and has been taken under special control."

The explosion in the St. Petersburg café-bar on the Universitetskaya Embankment occurred on the evening of April 2. At this time, there was a creative evening of the military commander Vladlen Tatarsky, whose real name is Maxim Fomin.

According to preliminary data, a statuette filled with explosives, which was given to Tatarsky by Daria Trepova, exploded.

RT published a detailed analysis of the biography of Daria Trepova and an explanation of why she is suspected of involvement in the terrorist attack. The student participated in protests organized by Navalny, transferred donations to the FBK and married a representative of the Libertarian Party. Her husband, Dmitry Rylov, said he had nothing to do with the explosion.

When detained, Trepova admitted that it was she who brought the statuette to the event. She claimed that she had been framed using the dark one. However, before that, the oppositionist had already been seen at other events organized by Tatarsky. According to one version, she was looking for contact with a journalist in order to "catch on" and rub into trust.

Earlier, RT told about the underground network that the extremist organization FBK, headed by opposition leader Leonid Volkov, managed to create in Russia. According to RT, several thousand recruits are involved in the underground.

* The organization is recognized as extremist, its activities are banned in Russia by the decision of the Moscow City Court of 09.06.2021.

** The Anti-Corruption Foundation is included in the register of NGOs performing the functions of a foreign agent by the decision of the Ministry of Justice of the Russian Federation dated 09.10.2019; the organization is recognized as extremist, its activities are banned in Russia by the decision of the Moscow City Court of 09.06.2021.

Included in the register of individuals performing the functions of a foreign agent, by the decision of the Ministry of Justice of Russia dated 22.04.2022.