Since Russia's full-scale invasion in February 2022, Ukraine has announced numerous operations to expose Russian agents on its soil. Malyuk had been personally involved in the investigation into the suspect and headed the operation to arrest him,

Ukraine’s security service, or SBU, said it detained the chief of its Anti-Terrorist Center, whom it accused of sharing intelligence with Russia, the agency said on Telegram.

The Security Service of Ukraine has reported that a Russian FSB "mole" had been exposed in the Security Service’s ranks. It was the head of the Security Service Anti-Terrorist Centre's headquarters. Source: press service of the Security Service of Ukraine;