Bulgaria's General Consul in Istanbul, Turkey, reported to the Ministry of Foreign Affairs information he received from the Chief of the Greek General Staff to Turkey. As recorded, the Greek General Staff reported a meeting between Turkish and Greek governments. The governments discussed a non-aggression pact between Warsaw Pact and NATO countries and the use of Polaris missile submarines in Turkish waters.

On 5 July 1963 the Bulgarian Ministry of Internal Affairs completed an information report on NATO's activity during the Cuban Missile Crisis. In the report, the ministry outlines detailed espionage carried out by NATO agents. According to the report, the NATO Military Intelligence Services provided instructions for NATO member-states' military attaches stationed in Warsaw Pact countries and agents they could get to cooperate with them. Agents were to observe and report specific military intelligence collecting in Warsaw Pact countries -- arms deliveries, missile sites, military movements, etc. The report also includes explanation of how the attaches carried out their intelligence gathering -- reading official press, speaking in Russian and misrepresenting themselves as Russian, etc . The Bulgarian Interior Ministry notes that Western governments were well-informed of Bulgarian military structures -- including exact formations and secret designations.

Bulgarian Embassy in Athens staff member Atanasov reports on Greek media accounts of military preparations to the Bulgarian Ministry of Foreign Affairs. According to Atanasov, Greek newspapers report preparations include Soviet movements in the Mediterranean in response to US submarines carrying Polaris missiles, Bulgarian maneuvers near the Greek and Turkish borders, and an anticipated NATO forward strategy in Greece. Atanasov adds that NATO is preparing the defense of possible attacks on Greece.

Bulgarian Ambassador to Greece Nikolai Minchev relays recent newspaper reports to the Bulgarian Ministry of Foreign Affairs. Minchev summarizes a recent NATO meeting in Athens where NATO staff and Turkish and Greek military personal discussed security in the two nations and the Balkan region as a whole.

In his cable to the Bulgarian Foreign Ministry, Ambasador Kiril Shterev reports information about expected US assistance to Greece in 1963. Shterev acquired the information during lunch with the Greek Charge d' Affaires, Counselor Kalougeras. Kalougeras also mentioned Turkey's possible entrance into the European Economic Community and inquired about US-Bulgarian relations.