The Vatican's top sexual abuse investigator said he had started taking testimony on Tuesday from victims in the Chilean capital, where he is looking into accusations that a bishop appointed by Pope Francis covered up crimes against minors.

Archbishop Charles Scicluna of Malta was sent to Chile after the pope was criticized during his visit last month for defending Bishop Juan Barros, who he appointed in 2015 despite accusations he had covered up sexual abuse of minors.

Several men have accused Barros of protecting his former mentor, Father Fernando Karadima, who was found guilty in a Vatican investigation in 2011 of abusing them and others when they were boys.