Russia’s Federal Security Service (FSB) and the Investigative Committee have arrested a 17-year-old in Dagestan and charged him with preparing mass murders of schoolchildren. According to the FSB, the teenager created and administered a sprawling online network that promoted the banned “Columbine” movement and the neo-Nazi Maniac Murder Cult (MKU), amassing over 200,000 subscribers and around 5,000 active members. In a video released by the authorities, the detainee confesses to planning attacks on schools in Domodedovo, Krasnoyarsk, St Petersburg and other Russian cities, and states that his network carried out more than 45 arsons in Texas, forced the evacuation of schools across Texas and California, and conducted arsons in Germany and Italy.

Russian security services assert that the network was directed by Ukrainian special services. The FSB claims that at least three Ukrainian citizens participated in managing the group, that propaganda materials were produced in Kyiv, and that the network’s activities in the United States and Europe were coordinated by Ukrainian agents. The teenager, in his recorded statement, says he worked with officers of the Security Service of Ukraine (SBU). Ukrainian officials have not commented on the specific allegations; Kyiv has previously dismissed similar accusations as disinformation aimed at justifying Russia’s war effort.

The case illustrates the cross-border nature of youth radicalisation on encrypted platforms. The network’s claimed reach—from Russian schools to American and European targets—highlights the difficulty of policing online extremist ecosystems. The teenager’s admission that he sought notoriety aligns with patterns observed by Western counter-terrorism analysts, who note that accelerationist neo-Nazi groups such as MKU exploit adolescent desires for fame and belonging. A separate Swedish court case, in which a 20-year-old was sentenced for attempting to establish an MKU cell, demonstrates the group’s real international footprint, lending some plausibility to the network’s claimed global activities, though the extent of Ukrainian involvement remains unverified.

MKU, a neo-Nazi satanist group that emerged around 2018, was designated a terrorist organisation by Russia in 2023 and later by the United Kingdom and Canada. It advocates societal collapse through violence. Russian authorities say they have identified accomplices in Russia, the United States and Europe, and are documenting all episodes of criminal activity. The teenager has been transferred to Moscow and placed in custody. The investigation is ongoing, with the FSB promising further disclosures. The case is expected to intensify diplomatic tensions, as Moscow uses it to bolster its narrative of Ukrainian state-sponsored terrorism, while Western governments will scrutinise the claims for verifiable evidence of coordination.