class="story-body__introduction">Police in Myanmar's Rakhine state have fired warning shots to disperse a Buddhist mob trying to block a boat carrying aid, reports say, according to BBC.The boat was bound for the violence-hit north, where a military campaign sparked by militant attacks has forced hundreds of thousands of Rohingya Muslims to flee the country. The mob threw petrol bombs at the boat and arrests were made, officials said. An official said the mob thought the aid was only for the Rohingya. Both Rohingya who have fled across the border into Bangladesh and those who stayed in Rakhine urgently need help, aid agencies say. The mostly Muslim Rohingya are a minority in Buddhist-majority Rakhine state. Myanmar denies them citizenship, saying they are illegal immigrants, and the state has seen violent ethnic conflict in the past. The latest crisis began on 25 August, when Rohingya militants attacked police posts. Since then, more than 400,000 Rohingya have fled to Bangladesh amid a military crackdown that the UN human rights chief has said "seems a textbook example of ethnic cleansing". Food, water and shelter are desperately needed for the new arrivals, aid groups say, but there are also serious concerns for those who stayed in Rakhine, where many Rohingya villages have been razed. But getting aid to displaced people who remain inside Myanmar is not easy, reports the BBC's Jonah Fisher. Aid agencies face restrictions from the authorities and at times open hostility from members of the Buddhist community who do not want them to help Rohingya Muslims.