Russia’s Federal Security Service says it has thwarted an assassination attempt against one of the country’s senior officials. According to the agency, Ukrainian intelligence services were preparing to stage an attack at Moscow’s Troekurovskoye Cemetery, where the official was expected to visit family graves.

Investigators said the operation was coordinated remotely. Surveillance was carried out through a camera disguised as a flower vase, enabling handlers abroad to guide the would-be perpetrators in real time. The FSB identified four people allegedly involved in the preparation of the attack, including a migrant from Central Asia.

The agency also warned that Ukrainian operatives, acting under the supervision of Western advisers, are developing similar schemes for attacks in other regions of Russia.

Footage released by the FSB includes testimony from one of the detainees. She stated that she agreed to carry out assignments while dependent on methadone. According to her account, she met a man calling himself Ruslan in a messaging app; he allegedly persuaded her to travel to Moscow and perform tasks in exchange for the drug. She added that her husband accompanied her on the trip.