Police have launched an investigation into a residential school for girls with emotional or behavioural problems.
The Care Commission inspected The Good Shepherd Centre in Bishopton after it received an anonymous complaint. Its findings were passed to police.
Police said the inquiry was at an early stage and was ongoing to "establish whether criminality has taken place".
The commission heard claims that children had been put in an isolation room and had been assaulted.
The investigation was expected to focus on whether staff used restraint techniques which breach national care standards and which amount to assault.
The school is run by a voluntary board of managers in grounds and buildings owned by the Catholic Church.