There are 300 Vietnamese Prisoner in S-21, Duch told the KR tribunal

On June 10, 2009, the former S-21 chairman Kaing Guek Eav called Duch told the KR tribunal that during KR regime, there are 345 Vietnamese had been sent to S-21. Duch told the tribunal when talking about the fact of the fight between Vietnamese Communist Party and Cambodian Communist Party.
Those Vietnamese mostly arrested during 1978 which devided into three categories, military, prison of war, spy, and civilians. According to the diagram shown in the tribunal, there are 35% of military, 42% of spy, and 23% of the civilian. Duch did not reject the diagram.