A female grade 11 high school student is dead while her sister who also attends the same Hanover institution is in hospital.

A female grade 11 high school student is dead while her sister who also attends the same Hanover institution is in hospital.

A female grade 11 high school student is dead while her sister who also attends the same Hanover institution is in hospital. A female grade 11 high school student is dead while her sister who also attends the same Hanover…