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.

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

A collaborator of the Bulgarian intelligence service provided detailed information on the personnel situation within the RFE Bulgarian Service.

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