In December 1958
Ngo Dinh NhuNgo Dinh Diem's younger brother and chief adviserbroached the idea of
orchestrating a coup to overthrow Cambodian leader
Norodom Sihanouk. Nhu contacted
Dap Chhuon, Sihanouk's
Interior Minister, who was known for his pro-American sympathies, to prepare for the coup against his boss. Chhuon received covert financial and military assistance from
Thailand,
South Vietnam, and the CIA. In January 1959 Sihanouk learned of the coup plans through intermediaries who were in contact with Chhuon. The following month, Sihanouk sent the army to capture Chhuon, who was summarily executed as soon as he was captured, effectively ending the coup attempt. Sihanouk then accused South Vietnam and the U.S. of orchestrating the coup attempt. Six months later, on 31August 1959, a small packaged lacquer gift, which was fitted with a
parcel bomb, was delivered to the royal palace. Norodom Vakrivan, the chief of protocol, was killed instantly when he opened the package. Sihanouk's parents, Suramarit and Kossamak, who were sitting in another room not far from Vakrivan, narrowly escaped unscathed. An investigation traced the origin of the parcel bomb to an American military base in
Saigon. While Sihanouk publicly accused Ngo Dinh Nhu of masterminding the bomb attack, he secretly suspected that the U.S. was also involved. The incident deepened his distrust of the U.S. ==1969==