No young men are being held at HMP Grampian two years after a riot at the £140m "super-jail".

Figures obtained by STV News under freedom of information legislation show the prison's population dropped significantly after the incident in May 2014, when 41 prisoners caused £145,000 worth of damage to the jail.

Nearly 150 inmates were transferred to prisons in the central belt in the following weeks, including 40 male prisoners under the age of 18.

Fewer than 100 young women have been held at HMP Grampian since the prison opened in March 2014.

It was designed to be the first jail in Scotland to house men, women and young offenders under the same roof.

Her Majesty's Inspectorate of Prisons for Scotland is due to publish its first report about HMP Grampian on Wednesday following an inspection in late 2015.

A Scottish Prison Service (SPS) spokeswoman said: "No date has yet been set for the return of male young offenders to HMP and YOI Grampian.

"SPS wants to make sure that the regime and curriculum currently available at HM YOI Polmont can be replicated at HMP and YOI Grampian to ensure that the young men continue to receive the best care and opportunities available.

"Furthermore the number of young male offenders has significantly dropped across the SPS estate."