Bangladesh authorities have ordered a leading Rohingya rights group to lock up its headquarters, said a spokesman for the group, which has emerged as a key voice for the Muslim minority stuck in refugee camps.Officials told community leaders in the camps in south-east Bangladesh to keep the office of Arakan Rohingya Society for Peace and Human Rights (ARSPH) padlocked until further notice.The order comes amid rising impatience in Bangladesh more than two years into hosting around a million Ro