Myanmar's security forces may be guilty of genocide against the Rohingya Muslim minority, the United Nations' top human rights official said Tuesday, adding that more were fleeing despite an agreement between Myanmar and Bangladesh to send them home.

Zeid Ra'ad al-Hussein, U.N. High Commissioner for Human Rights, said that none of the 626,000 Rohingya who have fled violence since August should be repatriated to Myanmar unless there was robust monitoring on the ground.

Myanmar Ambassador to the U.N. Htin Lynn said that his government was working with Bangladesh to ensure returns of the displaced in about two months and "there will be no camps."