Law enforcers are struggling to stop the spread of Rohingyas from registered as well as temporary camps as middlemen and locals are helping the refugees to settle outside the camps.

Tens of thousands of Rohingyas, who are staying either in the open or in makeshift tents by the Cox's Bazar-Teknaf highway, hardly have any drinking water and sanitation facilities.

Thailand is preparing to receive people fleeing fighting in Myanmar and send them back "when they are ready", the prime minister has said, following a series of attacks by Rohingya Muslim insurgents on Myanmar security forces last week.