002/19-09-2007-ECCC-OCIJ ЮŲŠ / No: D427 Location and Establishment 516. According to the CPK’s system of identifying administrative boundaries Koh Kyang security centre was located in Koh Kyang Village, Prey Nup District, Sector 37, West Zone, Khum O Chrov Subdistrict, Sihanouk Province.2234 Koh Kyang security centre operated as the security centre for both Sector 372235 and the West Zone.2236 It appears to have been operational since 1976.2237 517. Koh Kyang security centre was divided into three prison compounds.2238 The first compound was composed of a prisoner house measuring 40 metres by 6 metres, a guard house and Sector 37 regiment military base.2239 In the second compound, prisoners were detained and interrogated.2240 The third compound was a work site2241 and was composed of two prisoner houses and a kitchen.2242 Functioning Structure and Personnel 518. In the immediate post-17 April 1975 period, Sector 37 of the West Zone was under the leadership of Sao Kang alias Nheuk2243 (arrested and transferred to S-21 in December 1976)2244 and [REDACTED] was his deputy.2245 From late-1976 through to 1977, the West Zone and particularly Sector 37 was subjected to purges due to purported enemy activities which led to the arrests of large numbers of the cadre.2246 This is further corroborated by reports after 1978, concerning the activities in the Zones.2247 The new secretary of Sector 37 became [REDACTED] with [REDACTED] as deputy secretary.2248 The secretary of Prey Nup District was Ta Phlorng alias Plang, who was arrested in 1977 and imprisoned at Koh Kyang security centre.2249 519. During the purges in 1977, Sector 37 was taken over by military forces of Division 1 of the West Zone, and troops arriving from Kampong Chhnang supervised the local administration and disbanded local military units.2250 While Koh Kyang security centre remained the Sector 37 security centre,2251 it was supervised by military forces2252 under the command of Soueng (deceased) and later [REDACTED].2253 520. The chairman of Koh Kyang security centre was Voeun alias Savoeun (deceased).2254 [REDACTED] was the deputy chairman and responsible for operations.2255 After Voeun Extraordinary Chambers in the Courts of Cambodia, National Road 4, Choam Chao, Dangkao Phnom Penh Mailing address: P.O. Box 71, Phnom Penh; Tel: +855(0)23 218914 Fax: +855(0) 23 218941. 134