Moung Sony lost contact with his younger brother, Moung Sopheak, on the afternoon of September 10. Hours later, Moung Sony, the president of the Khmer Student Intellectual League Association, was informed by the United Nations officials that Moung Sopheak was arrested by the police.
Moung Sopheak, who is also a member of KSILA, was seen three days earlier at a rally that was blocked by local authorities and security personnel. The rally was calling for the release of youth activists arrested in the past month over incitement charges, including KSILA vice president Mean Prommony.
According to the government, all the arrested activists, who initiated the protests to call for the release of jailed unionist Rong Chhun, had attempted to commit “incitement to cause chaos by jeopardizing public security.”