Police officers investigating allegations of sexual and physical abuse at Fort Augustus Abbey School have identified 20 possible victims.
Abuse at the school featured in a BBC Scotland programme in July.
The police started their own investigation into Fort Augustus and its prep-school, Carlekemp, in March, following a former pupil's complaint.
BBC Scotland has been contacted by more than 50 people making allegations of abuse at the schools.
A joint statement by Police Scotland and the Crown Office said: "The investigation has so far identified more than 20 possible victims and extends to liaison with a number of law enforcement agencies across and outwith the UK.
"Specialist officers from Police Scotland will carry out a thorough investigation and thereafter will report their findings to the Procurator Fiscal for the North of Scotland."
-BBC
