Twenty lawsuits were filed against the Norwich Roman Catholic Diocese this week on behalf of several men who claim they were assaulted as boys at a day school for at-risk children.

The alleged abuse—which the lawsuit outline in explicit detail—occurred over the course of a decade and involved boys between the ages of 10 and 15. The alleged abuse was perpetrated at the former Academy of Mount St. John in Deep River by Christian brothers Paul McGlade and Pascal Alford, according to the lawsuit.

Both men have since died, but the lawsuits say the two were known sexual predators and that the diocese should have been aware of their alleged behavior. The residential facility had a clinical day school and was organized and operated by the diocese, according to the lawsuits.