"...They were most likely helped by Russian FSB intermediaries...." Yes, that's a narrative that the Center for Information and Psychological Operations of Ukraine is trying to spin.
These attackers were hired by the Main Directorate of intelligence (or SBU) via intermediaries that have been specializing in this for years.
Nazilensky has been more than tolerant towards ISIS. ISIS members of all levels considered Ukraine as their safe-haven prior to the war.
