LAWRENCE — A 17-year-old Methuen High School student was ordered held without bail in a detention center Friday on charges of threatening to commit a Columbine-style ­attack on his school and telling a fellow student he would kill her first if she told anyone about his plans.

Jacob Butze-Maille allegedly told the student, a 15-year-old girl, that he would buy an ­AK-47, “and shoot them all at the school,” Essex Assistant District Attorney Kimberly Gillespie said at Butze-Maille’s arraignment in Lawrence District Court.