The Central Intelligence Office (vi: Phủ ÃÂặc ủy Trung ðáng Tình báo) was the national strategic intelligence agency for the government of the Republic of Vietnam (South Vietnam), headquarters in Saigon. It was created in 1961, via Executive Decree No. 109/TTP, signed into law on May 5, 1961, by President Ngô ÃÂình Diá»Âm. The agency was responsible for investigating, gathering and analyzing strategic & military intelligence information on communist North Vietnam, and its branch in South Vietnam, the Viet Cong, and report and advise the South Vietnamese government on national security.
The Intelligence Office included three divisions:
Each military corps zone (I - IV) has one Special Contact Mission under the Domestic Intelligence Bureau. Overseas, there are Foreign Intelligence Bureau departments in France, the United Kingdom, Japan, Thailand and Cambodia.
According to journalist Huy ÃÂức's 2013 book, Bên Thắng cuá»Âc (The Winning Side), on April 24, 1975, Nguyá» n Khắc Bình (Director of the CIO) secretly fled. Acting President Trần VÃÂn Hðáng then appointed Nguyá» n Phát Lá»Âc, an assistant of Binh, as the new Director. On the afternoon of April 28, 1975, the U.S. Embassy in Saigon asked all CIO staff to evacuate to 3 Bạch ÃÂằng St. and await for evacuation out of Vietnam; they fled to 2 Nguyá» n HáºÂu St. afterwards. However, on April 30, 1975, at 01:00, electronic communication between the Embassy and CIO staff were cut, leaving them stranded there.