FSB (Federal Security Service of the Russian Federation)
The Federal Security Service of the Russian Federation (FSB) is Russia’s principal domestic security agency, responsible for counterintelligence, counterterrorism, and other federal security functions. It operates as the main successor to the Soviet KGB’s domestic-security functions and reports to the president of the Russian Federation.
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HUR warns of disinformation campaign targeting military intelligence amid SBU clash
Ukraine's Main Intelligence Directorate (HUR) said on 3 September that a targeted disinformation campaign is being deployed to discredit military intelligence and its combat units, urging the public to trust only verified official sources and asking journalists to report any paid offers of dubious material. The warning came against the backdrop of an armed confrontation between HUR and the SBU in Kyiv on 2 September tied to the detention of Russian Volunteer Corps deputy commander Stepan Kaplunov, and was followed by President Volodymyr Zelensky dismissing an SBU department head and calling the SBU–HUR clash "shameful."