DHAKA, Bangladesh — Bangladesh is planning to build separate shelters for 6,000 Rohingya Muslim children who entered the country without parents to escape violence in neighboring Myanmar, a government official said Tuesday. Children make up about 60 percent of the estimated 480,000 Rohingya Muslims who have poured into Bangladesh over the last four weeks to flee persecution in Buddhist-majority Myanmar. Junior minister Nuruzzaman Ahmed said the social welfare ministry has asked local authorities for 200 acres of land to build facilities for the children without parents, and about 1,580 such children have already been registered. The U.N.