The UN's office for refugees has used Cambodia as an asylum without the consent of the government, Hun Sen said Thursday.
The UN High Commissioner for Refugees had put Afghans, Pakistanis, Nigerians and other Africans in Cambodia, he said.
"There is no Taliban in power. Why are there Afghans coming to request political asylum in Cambodia?" Hun Sen asked. "It's not proper."
In 1992 Cambodia progressively signed a UN convention and refugee protocol, but the stream of Montagnards from Vietnam has tested the country's relationship with the office, a UNHCR Web site says.