Even as the number of Rohingya refugees fleeing Burma over the past month has passed half a million, thousands continue to arrive across the border. The journey is long and perilous – about 60 Rohingya are presumed dead after a boat capsized off the Bangladesh coast on Thursday.

The flight of the Rohingya is the fastest exodus since the aftermath of the Rwandan genocide 23 years ago. At a UN Security Council meeting on Thursday, Secretary-General António Guterres called it “the world’s fastest developing refugee emergency and a humanitarian and human rights nightmare.” Below, scenes of the ongoing arrivals.