About 100 people, including Buddhist monks, have protested outside of Australia's embassy in Cambodia against a deal to be signed later Friday that will see asylum-seekers rejected by Australia resettle in Cambodia.

A senior Australian minister says the bilateral agreement will cost the Australian government more than 10 million Australian dollars ($9 million) a year,.

Immigration Minister Scott Morrison will sign a memorandum of understanding with Cambodian Interior Minister Sar Kheng in Phnom Penh to resettle an unspecified number of refugees currently held at an Australia-run detention camp on the tiny Pacific island nation of Nauru.

Critics charge that Cambodia's poor human rights record puts any resettled asylum-seekers at risk.