Authorities in Bangladesh have banned a radical Islamist organization suspected of involvement in the murder of three secular bloggers who were hacked to death in the majority-Muslim South Asian nation earlier this year. The attacks on Avijit Roy and Washiqur Rahman, who were murdered in the country’s capital city, Dhaka, in February and March, respectively, and Ananta Bijoy Das, who was killed earlier in May in northeastern Bangladesh, sparked domestic and international concern about the rise of fundamentalist violence in the country. U.S.