Since August 25, the number of Rohingya refugees who have crossed the border from Myanmar into Bangladesh has now reached 389,000, Stephane Dujarric, spokesman to the UN Secretary General told reporters at the UN headquarters in New York.
"In the last 24hours alone, 10,000people reportedly crossed into Bangladesh. Combined with those who fled during the last round of violence in Rakhine State last October, it is estimated that some 40percent of the total Rohingya population living in Rakhine State have now fled into Bangladesh," he said.
It is estimated that 60percent of Rohingya refugees arriving in Bangladesh are children, he added.
"The sheer number of refugees has overwhelmed pre- existing refugee camps, with new arrivals seeking shelter anywhere they can find space," Dujarric said.
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According to UNICEF there are acute shortages of everything, most critically shelter, food and clean water, and is also helping Bangladesh government on improving water treatment plants.
The UN Security Council had earlier expressed concern over the security situation in the Rakhine State.
"There needs to be a focus, obviously, as he said, on the halt of the, of military and security operations.
Underlying issues need to be dealt with in Rakhine State, and what we urgently, urgently need is an international mobilisation of support for the tens of thousands of, of very vulnerable people who we have seen streaming into Bangladesh, often already arriving in very poor condition," the spokesman said.
"The percentage of children is astounding, all these people that need to be helped now," Dujarric said.