DUBLIN (AP) — Ireland should investigate the Catholic Church’s mistreatment and burial of babies who died decades ago in nun-operated homes for unmarried mothers, a senior church official declared Sunday as the country confronted another shameful chapter of its history of child abuse.

Dublin Archbishop Diarmuid Martin made his appeal following revelations that hundreds of children who died inside a former church-run residence for infants were buried in unmarked graves at the site in western Ireland.