Myanmar’s treatment of its Muslim Rohingya minority appears to be a “textbook example” of ethnic cleansing, the top United Nations human rights official has said. In an address to the UN human rights council in Geneva, Zeid Ra’ad Al Hussein denounced the “brutal security operation” against the Rohingya in Rakhine state, which he said was “clearly disproportionate” to insurgent attacks carried out last month. More than 310,000 people have fled to Bangladesh in recent weeks, with more trapped on the border, amid reports of the burning of villages and extrajudicial killings.