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In page Ministry of Internal Affairs (Russia):

"

Secret police became a part of MVD after Lavrenty Beria merged the MGB into the MVD in March 1953. Within a year Beria's downfall caused the MVD to be split up again; after that, the MVD retained its "internal security" (police) functions, while the new KGB took on "state security" (secret police) functions.[citation needed]