A 12-year-old Pakistani boy said on Saturday that he killed a fellow student at an Islamic school in Multan because he was angry that a teacher had been sexually abusing him and other children and he wanted the school to close. The boy, who was arrested on Friday, said he had no ill feeling against the 10-year old boy whose throat he slit a week ago. ‘‘I wanted to give a bad name to the school so that the abuse of children could stop.’’ PTI