The publication of a report into the killing of schoolboy Bailey Gwynne has been delayed, STV News has learned.

The 16-year-old died after being stabbed through the heart at Cults Academy in Aberdeen on October 28.

His killer, who cannot be named because of his age, was found guilty of culpable homicide after a trial at the High Court in Aberdeen.

Following his conviction, an independent inquiry was launched in attempt to establish the events which led to the killing.

It was expected to reveal its findings this month, but the publication of its report has now been delayed until mid-October.

Child protection expert Andrew Lowe, who is leading the review, is understood to be on holiday during the first week of October.

An Aberdeen City Council spokesman said: "When the independent review was commissioned, the intention was to publish it by the end of September 2016.

"However, as a result of the level of detail required and the number of interviews conducted, this period has been slightly extended. We expect the report to be published in the next couple of weeks."

On the first day of the trial over Bailey's killing, Cults Academy head teacher Anna Muirhead said she warned his killer about the dangers of bringing weapons into school several years ago.

Despite her advice, the 16-year-old said he regularly carried a knife in an attempt to "be cool". One witness said they had seen him with a knife "maybe 25 times" before the killing.

Aberdeen City Council said it had never been reported to teachers and claimed staff were unaware of the problem.