Bangladeshi Foreign Minister Abul Hassan Mahmood Ali has said that more Rohingya Muslim refugees arrived into Bangladesh from Myanmar, as the two countries agreed to set up a “working group” to plan the repatriation of more than half a million Rohingyas.

The United Nations has called the exodus of five hundred seven thousands Rohingya since late August the world’s fastest-developing refugee emergency, and says Buddhist-majority Myanmar is engaging in ethnic cleansing against its Rohingya Muslim minority.

Many refugees are gloomy about the prospects of going back to Buddhist-majority Myanmar, fearing they will not be able to furnish the documents they anticipate the government will demand to prove they have a right to return.