The location of the Vietnamese Montagnard family taken by Cambodian police from a

UN shelter remains a mystery to those involved in the case.

"All we've been told [by the government] is that they took a taxi back home,"

said a UNHCR officer based in Phnom Penh, who spoke on condition of anonymity.

Ksor Choi, the father of the family, is the brother of Ksor Phen, a prominent Montagnard

activist imprisoned in Vietnam. Choi was taken by police outside the UNHCR's Site

Four in Phnom Penh. His wife and two children were detained later that day.

Human Rights Watch feared they have been forcibly repatriated.

Vietnamese Embassy spokesperson Nguyen Thanh Duc could not confirm the whereabouts

of the family. "I have not been given any information on this matter,"

Duc said.

When contacted by telephone, spokesperson for the Ministry of Interior Khieu Sopheak

said "Hello" and then hung up.