Cambodian authorities accused Sok Yoeun, a member of a Cambodian opposition party, of being responsible for a 1999 rocket attack, which Prime Minister Hun Sen claimed was aimed at him. This allegation was widely believed to be unfounded but he was kepting in detention for five years in Thailand (where he had escaped to) and Amnesty International found Sok Yoeun to be a prisoner of conscience, campaigning for him several ways including several different Urgent Actions issued during 2000, 2001, 2002, and 2003. Sok Yoeun, a Cambodian national, was finally reunited with his family in Helsinki, Finland on 27 February 2004, one day after being released from a Thai prison in Bangkok.