LEDUC, Alta.—A 17-year-old female student is dead and a fellow student is in police custody after a violent assault at a school just south of Edmonton. The attack happened Monday morning in a classroom at Christ the King School in Leduc. The school has about 350 students in Grades 9 to 12. RCMP said the girl was airlifted to an Edmonton hospital, where she died of her injuries, and her death is being investigated as a homicide. Bob Young, mayor of Leduc, said the girl was stabbed and all schools in the area were locked down until police made an arrest. Police said a 19-year-old man, who was a student at the same school, was taken into custody about two hours later at another location. Insp. Dale Kendall said the two students were known to each other, but she wouldn’t say if it’s believed that the attack was targeted. She …