Men, women and children fleeing atrocities by Myanmar security forces in the western state of Rakhine faced a “heightened risk” of falling victim to human trafficking, Stephane Dujarric, spokesman for UN Secretary General Antonio Guterres, said.
Rohingya have been targeted by what UN High Commissioner for Human Rights Zeid Ra’ad Al Hussein described as a “textbook example of ethnic cleansing”.
They are fleeing a fresh security operation in which security forces and Buddhist mobs have killed men, women and children, looted homes and torched Rohingya villages.
According to Bangladeshi Foreign Minister Abul Hasan Mahmood Ali, around 3,000 Rohingya have been killed in the crackdown.
In total, more than 800,000 Rohingya refugees are now believed to be in Bangladesh.
Turkey has been at the forefront of providing aid to Rohingya refugees, and President Recep Tayyip Erdogan has raised the issue with the UN.
The Rohingya, described by the UN as the world's most persecuted people, have faced heightened fears of attack since dozens were killed in communal violence in 2012.