Bulgarian Ambassador to Cuba Stefan Petrov analyzes Cuba’s domestic and foreign policies in an informational report to Bulgarian leader Todor Zhivkov. Petrov criticizes Cuban Communist Party policies and claims they are incompatible with Marxism-Leninism (e.g. Cuba’s focus on conflict between imperialism and national liberation rather than socialism and capitalism). Cuba has adopted an anti-Soviet attitude and believes Cuban leadership is the vanguard of communism. Petrov reviews Cuba’s conflicting relations with Latin American communist parties and Cuba's support to guerilla movements in the region. Petrov notes that Bulgarian-Cuban relations remain positive.

First Secretary of the Bulgarian Embassy to Cuba A. Hubenov describes a Latin American communist party conference held in Havana, November 1964. The parties secretly discussed their struggle against imperialism and the expansion of communist revolutions in Latin America and Cuba's assistance to that struggle. Conference deliberations included a discussion of the Sino-Soviet split and the fear of factions within the communist movement.

Soviet Foreign Minister Andrei Gromyko cables the Soviet Embassy in Havana that the Soviet leadership had decided to allow UNSG U Thant and his representatives to visit Soviet launchers sites in Cuba and verify that the launchers are being dismantled.