US Embassy telegram 779A, 18 Oct 1965: Foreign Ministry aide Sutarto says anti-PKI action is spreading across Sumatra, Sulawesi and Central Java, targeting Subandrio. Early-aftermath political context; no Gerwani content.
US Embassy telegram, 30 Nov 1965, recording a Polish diplomat's claim that a PKI Central Committee member was 'elated' on 1 October and that only an Aidit-led 'special group' knew of the plot. Secondhand diplomatic evidence on PKI involvement.
US Embassy Joint Weeka no. 46 (airgram A-373), 7 Dec 1965: Aidit's capture and death, the fate of Politburo members, and a figure of 34,000 PKI prisoners in Java. Context on leadership elimination and detention scale.