Prominent Chilean Catholic priest, Oscar Munoz, who held senior positions in the archdiocese of Santiago, has been detained over allegations that he sexually abused seven children.
The alleged abuse by Fr Munoz, 56, took place from 2002 in the capital Santiago and the southern city of Rancagua, prosecutor Emiliano Arias said.
Fr Munoz was vice-chancellor and then chancellor in the archdiocese of Santiago from 2011, before he was removed two months ago after admitting in January, days before Pope Francis' visit to Chile, that he had abused a minor.
He was initially investigated by the Chilean church, which then referred the case to the Vatican.
The abuse was uncovered by Chilean prosecutors when the church's case file was seized during a June operation.
Mr Arias confirmed the investigation included a possible cover-up involving senior members of the clergy, among them the two most recent archbishops of Santiago, Francisco Javier Errazuriz and Ricardo Ezzati.
Archbishop Ezzati said the archdiocese was available to cooperate "in everything that is required".
Chilean police also set up an email address appealing for any other allegations related to the case.
The Chilean church has been hit by child abuse scandals implicating dozens of priests.
Pope Francis has accepted the resignations of five bishops, four of whom were accused of turning a blind eye to abuse or covering it up.