A 16-year-old boy has died following a suspected stabbing at a secondary school in Aberdeen.
The pupil, named locally as Bailey Gwynne, was taken by ambulance to Aberdeen Royal Infirmary after police were called to a serious incident at Cults Academy in the west of the city at about 1.30pm.
He suffered serious injuries and it is understood he died a short time later in hospital.
Police have confirmed that it is being treated as a murder investigation.
A 16-year-old boy has been detained in connection with the incident and is said to be helping police with their inquiries.
Aberdeenshire police division chief inspector Graeme Mackie said: “This is a shocking and extraordinary incident for Aberdeen and firstly our thoughts are with the family and friends of the boy who has sadly lost his life today.
“A full and thorough enquiry is under way and there will be a police presence in the area for the foreseeable future.
“We are working closely with the education authorities and wider community as I am sure this incident will be felt not only in Aberdeen but much further afield.”
Cults Academy head teacher Anna Muirhead said: “Pupils and staff are in a state of total shock.
“The boy involved was a very gentle, caring pupil with a lot of friends.”
She added: “The whole school community is totally devastated but at the moment our thoughts are all with the boy’s family and his friends and what they must be going through at this tragic time.”
Aberdeen City Council leader Councillor Jenny Laing said: “I am deeply saddened by the news … I am sure that I speak for everyone across the city when I say how shocking this is.
“I would like to offer my sincere sympathy to the boy’s family and friends at this most difficult time.”