Acute shortages of water and medical treatment in western Myanmar following attacks on humanitarian groups are the latest hardships imposed on Rohingya Muslims that "could amount to crimes against humanity", a UN expert said Monday.
The United Nations' human rights envoy to the country, Tomas Ojea Quintana, said a wave of attacks against aid organisations had choked off health, water and food supplies, increasing the vulnerability of the Rohingyas.
"Recent developments in Rakhine State are the latest in a long history of discrimination and persecution against the Rohingya community which could amount to crimes against humanity," he said in a statement reported AFP.
More than 170 aid workers were pulled out of the state as a result of last month's unrest -- the first time they have been forced to leave en masse -- and there are fears that the entire relief infrastructure has been severely damaged.
The exodus has deepened an already dire health situation for hundreds of thousands reliant on international medical relief, with some 140,000 in the camps, as well as more than 700,000 vulnerable people in isolated villages severely affected.
Rakhine has been almost completely segregated on religious lines after long-standing animosity between Buddhists and Muslims erupted into bloodshed in 2012, leaving dozens dead in clashes.
Tensions have been heightened by Myanmar's first census in three decades, which has stoked anger among Buddhists that it might lead to official recognition for the Rohingya, a Muslim minority viewed by the authorities as illegal immigrants from Bangladesh.
Quintana said the government's decision not to allow Rohingyas to register their ethnicity in the census meant that the population tally was not in accordance with international standards.
British Foreign Minister Hugo Swire tweeted Monday that he had summoned the Myanmar ambassador "to register our deep concern about humanitarian access and conduct of census in Rakhine".
Rohingya Muslims in Rakhine are subject to a web of restrictions on everything from movement and employment to marriage and in some areas family size.