LONDON (AP) — Police have started a murder investigation after a 16-year-old boy was stabbed to death at a school in the northern Scottish city of Aberdeen.

The student died in a local hospital Wednesday after the attack at Cults Academy.

Police detained another 16-year-old boy after the stabbing in the city 550 miles (885 kilometers) north of London and said there will be an added police presence in the area "for the foreseeable future."

Police did not name the victim or the teenager who was detained.

The academy has scored highly in a ranking of Scottish schools based on exam results.