On October 1, 1965, the kidnapping six high ranking Indonesian generals was discovered by government authorities in Jakarta prompting a massive response. As anti-communist authorities scrambled to respond, one of their number General Suharto took control of the situation and blamed his rival, the PKI – the Indonesian Communist Party, which was tied “30th September Movement” that claimed responsibility for the kidnapping. Suharto brutally repressed the PKI whose ties to the coup attempt were tenuous at best. A few days later the kidnapped generals were found dead outside of Jakarta and Suharto really cracked down. He became the true power in Indonesia and would become president in 1968 (and would remain so until 1998!). During his regime, there would be a very bloody crackdown on perceived Communists in Indonesia that resulted in the deaths of about 500,000 people.
Source: Cribb, Robert. “Behind the coup that backfired: the demise of Indonesia’s Communist Party.” The Conversation. 29 September 2015.