The United Nations says nearly 40,000 Rohingya Muslims have crossed the border in the past week, prompting Bangladesh to further tighten its border and in many cases send them back.

Nikki Haley, the US ambassador to the UN, is demanding Myanmar's military stop attacking civilians and aid workers.

Rohingya refugees have recounted atrocities committed by Myanmar's military in Rakhine state.

Al Jazeera's Victoria Gatenby reports.

Asia Pacific, Myanmar, Human Rights