Anne Richard, US Assistant Secretary of State for population, migration and refugees, said resettling all Rohingya refugees in the United States would entice others to leave their homeland.
"The answer to the issue is peace and stability and citizenship for the Rohingyas in Rakhine state, and that is the solution," she said at the end of a three-day visit to Malaysia.
Since early May, more than 4,600 boat people from Myanmar and Bangladesh have been brought ashore from Southeast Asian waters. Several thousand more are believed to still be at sea after human smugglers abandoned their boats amid a regional crackdown.
Some are Bangladeshis who left their impoverished homeland in hope of finding jobs abroad. But many are Rohingya Muslims who have fled persecution in Buddhist-majority Myanmar, which has denied them basic rights, including citizenship, and confined more than 100,000 to camps. There are more than 1 million Rohingya living in the country formerly known as Burma.
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Richard said 18-24 months would be a more realistic time frame for the United States to resettle refugees.
But she warned that only a small fraction of the world's refugees will be resettled, mainly including torture victims, widows and orphans or those with medical needs.
"Resettlement is not the solution for most refugees on Earth. The most important solution is people don't have to leave their country in the first place," she said.