Prosecutors have been tolf to take a hard line in any case of online hate comments about the Glasgow helicopter crash.

Police are investigating comments made about the tragedy which killed nine people when a police helicopter crashed into the Clutha bar on November 29.

A 16-year-old boy was arrested last week for allegedly posting sectarian and racist comments online about the incident.

Lord Advocate Frank Mulholland wants a "robust prosecution policy" and guidance is to be issued to prosecutors on dealing with hate crimes linked to the tragedy.

Fiscals will be told that where it can be demonstrated that such an offence was motivated by a reaction to the events at the Clutha bar there will be a presumption in favour of criminal proceedings and all such cases must be reported for Crown Counsel's instructions.