A human rights group urged Myanmar’s government on Monday to back an independent international investigation into alleged abuses by security forces against members of the Muslim Rohingya ethnic minority, including the reported systematic use of sexual violence. U.S.-based Human Rights Watch said in a statement that soldiers and Border Guard Police took part in rape, gang rape, invasive body searches and sexual assaults while conducting counter-insurgency operations in the western state of Rakhine from October through mid-December.