002/19-09-2007-ECCC-OCIJ ЮŲŠ / No: D427 Lower ranks would, in turn, disseminate the material among the population in the zones and sectors.256 Letters 91. Letters were sent from senior CPK leaders such as POL Pot, Nuon Chea, Khieu Samphan and Ieng Sary.257 Letters were reportedly delivered through messengers to zone and sector secretaries.258 One of the telegrams sent from the Central Zone (fomer North Zone) indicates that letters were sometimes carried in person by higher officials such as Zone Secretary Ke Pork himself.259 Messengers 92. Messengers were primarily used to deliver reports and telegrams from the radio telegraphic unit to ministries260 or for communicating information about arrests.261 Within the different zones, “Messengers carried correspondence by hand on bicycles and motorcycles. Messengers were very busy and spent only a short time in each location before returning to their home base. Messengers were not tied to one single link but worked all the different links serviced by their station”.262 One witness states that messengers from the Centre would use a speed boat to get to Kratie in Autonomous Sector 505.263 Telegram Communication 93. After the fall of Phnom Penh in 1975, the central telegram unit that had operated in the “liberated areas” was moved to Phnom Penh.264 About 40 children were recruited from the provinces and were taught the basic working techniques of telegram communication (coding, typing, etc.) as well as sometimes French and English.265 On 9 October 1975 the Standing Committee decided on the functioning of the telegram unit.266 94. The telegram unit, which was divided into two sections (one responsible for transmitting and receiving the telegram, and the other for the encoding and decoding)267 was code named K-18 and was located in Phnom Penh at the old United States Embassy (now the Fishery Administration).268 Office K-18 was composed of an internal communications section with Oeun in charge and an external communications section with Rim in charge.269. Approximately 20 to 30 persons worked in each of the two sections. 270 Subsequent chairmen of the telegram unit were Yos271 (also mentioned as deputy chief272) and [REDACTED].273 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. 29