WPVI-TV reports that the attack happened at the Howard High School of Technology. Emergency personnel performed cardiopulmonary resuscitation on the victim and then transported her by helicopter to a Wilmington hospital, where she was pronounced dead.
The name of the girl, who was a sophomore, has not been released.
Students told reporters that the fight was over a boy, and that the girl was fighting with another girl in a bathroom when she was attacked by others..