Agreement for cooperation between the intelligences agencies of Bulgaria, Hungary, East Germany, Poland, Romania, Czechoslovakia and the Soviet Union on "measures to ensure the safety of civilian aircraft from hijacking, [and] acts of sabotage."

A bomb exploded outside the RFE building in Munich on February 21, 1981, severely injuring several employees and causing major physical damage. This document, and others like it, indicates that the Ceausescu regime commissioned the “Carlos group” to carry out the attack. The Carlos group was then resident in Budapest, and this document indicates that the Hungarian Interior Ministry had advance knowledge of the bombing.