A 16-year-old boy has appeared in court charged with murdering Aberdeen schoolboy Bailey Gwynne.
Gwynne, also 16, was stabbed to death at Cults Academy on Wednesday afternoon.
The suspect, who cannot be named for legal reasons, appeared at a private hearing at Aberdeen sheriff court on Friday afternoon.
He was charged with murder and having a blade on school premises, BBC Scotland reported.
He made no plea or declaration and was remanded in custody. He is expected to next appear on 6 November.
Earlier this week, floral tributes were left outside the gates of Cults Academy.
A candlelit vigil for Gwynne was also held at Cults Parish Church on Thursday evening.
Rev Ewen Gilchrist, the parish minister and a member of the school's chaplaincy team, said there is "a sense of shock and horror in the community", Sky News reported.
People have also been paying tribute on social media, and Facebook groups have been set up in Gwynne's memory.
Aberdeen city council chief executive Angela Scott praised "acts of heroism" at Cults Academy.
"I know that there were individual acts of heroism at the school," Scott said in a statement, the BBC reported.
"I fully appreciate that there were sights and experiences for many that you simply do not expect to have to face.
"The anguish being suffered by parents, family, and friends is unimaginable."
Commenting on the police investigation on Wednesday evening, 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 inquiry has been launched 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."