The warning triggered a security operation at the historic estate, with Russian authorities temporarily closing the complex and evacuating visitors and staff
The security agency said the information had prompted it to take appropriate measures and that a suspect had subsequently been detained. Russia’s Investigative Committee is considering further legal and procedural action against the minor, the FSB said. The FSB said on Sunday that it had received information from US counterparts through established partner channels about preparations for an attack at the Tsaritsyno Museum Reserve in southern Moscow.
The detention came a day after the US Embassy in Moscow issued an urgent security alert, warning of a “credible threat of a mass casualty event” at the Tsaritsyno Museum Reserve on October 31. The embassy said the US government was coordinating with Russian authorities over the response and advised American citizens to avoid the location and large crowds. Musician Lilia Pechenkina, who was performing at the reserve when the alert was triggered, said evacuation sirens sounded over the public address system as she was finishing her performance.
Security personnel were deployed around the former imperial estate as emergency measures were put in place.