11.   Liu wants his three-year labor-camp sentence overturned, compensation for a year he spent in secret detention and an explanation for his confinement.

12.   Secret detentions and banishment to labor camps have become a preferred form of punishment for dissidents, analysts say.

13.   Srun Vong Vannak disappeared more than three weeks ago, Sam Rainsy said, and may have been held in secret detention aimed at producing a political frame-up.

14.   The executive order was the latest in a series of measures approved by Bush or the U.S. Congress which include facilitating wiretaps and allowing for secret detentions.

15.   Government officials, however, have repeatedly denied the existence of military run secret detention facilties.

16.   Amnesty International has also accused the Khartoum regime of abuses, saying in a report released in September that the government was responsible for secret detentions and torture.

17.   But the document also charged that the Royal Cambodian Armed Forces engage in murder, abduction, pillaging and operate secret detention centers where toruture and summary executions occur.

18.   The report dismissed allegations of secret detention facilities in Battambang city itself but was inconclusive about the existence of Cheu Kmau detention centre.

19.   Several thousands of others may still be languishing in secret detention centres, Peiris said.