At least 6,700 Rohingya Muslims were killed in the first month of a Myanmar army crackdown on rebels in Rakhine state that began in late August, Doctors Without Borders said on Thursday. A world authority on genocide has told Sky News what is happening to Myanmar’s Rohingya Muslims is undoubtedly genocide and the international community must intervene to prevent it. The United Nations can help Myanmar to defuse inter-communal tensions and create an environment for safe and dignified repatriation of Rohingya refugees, the Organization’s top political official said Tuesday, stressing that the country could also tap the UN’s capacities and experience in tackling other challenges, including democratic consolidation.