Bulgaria. Ministry of Internal Affairs

A proposal for the measures against the Yugoslav agents and their collaborators who, on Tito’s behalf, were allegedly working for the annexation of the Pirin Region by the Yugoslav Federation.

Report on the intelligence activities of some Western governments in Sofia. The report identifies the main areas of interest of the foreign intelligence services, names of some agents and names of collaborators.

The head of the Bulgaria's Ministry of the Interior informs Erich Mielke of developments in the criminal case against Sergei Antonov.

Documents from the Stasi archives on the anti-Bulgarian campaign surrounding the investigation of the assassination attempt.

Turkish intelligence agents are trying to gather information on the uranium mining in southwest Bulgaria. They believe that the extracted deposits are shipped to the Soviet Union for further processing and production of nuclear bombs.