On Sunday, tensions mounted at refugee camps in Bangladesh holding hundreds of thousands of Rohingya Muslims over an operation to send them back to Myanmar. Some refugee leaders said Bangladesh military officials had threatened to seize their food ration cards if they did not return.The refugees refuse to go back unless their safety can be guaranteed and Myanmars grant their demands to be given citizenship. Under an agreement signed last week, Myanmar is set to receive Rohingya refugees from Bangladesh at two reception centers and a temporary camp.