Pope Francis is to study a report into the Tuam mother and baby home, given to him on his Irish visit
The two day trip was dominated by the issue of clerical sex abuse - with the Pontiff calling on the Irish people to forgive those in the church who covered it up.
Children's Minister Katherine Zappone was one of the first to meet him when he arrived in Ireland on Saturday - highlighting the controversy of the mother and baby home in Tuam.
The Pope told reporters on the papal flight to Rome last night that Ms Zappone told him about the discovery of mass graves of children - and that the church has something to do with it.
He confirmed he has been sent a memo on the issue, but had yet to study it.
Yesterday the Pontiff acknowledged that senior members of the church kept quiet about child sexual abuse - calling on those at the mass in the Phoenix Park to forgive them.