VATICAN CITY — Pope Francis lamented Wednesday how Irish church authorities failed to respond to the crimes of sexual abuse, speaking during his first public appearance at the Vatican after bombshell accusations that he himself covered up for an American cardinal’s misdeeds.

Francis presided over his weekly general audience in St. Peter’s Square and spoke about his weekend trip to Ireland, where the abuse scandal has devastated the Catholic Church’s credibility.

The final day of the trip was overshadowed by release of a document from a retired Holy See diplomat accusing Vatican authorities, including Francis, of covering up for ex-Cardinal Theodore McCarrick despite knowing for years that he regularly slept with seminarians.

The author of the document — retired Vatican ambassador to the U.S., Archbishop Carlo Maria Vigano — said Francis should resign for his complicity in the McCarrick scandal, which has implicated two decades’ worth of U.S. and Vatican church leaders.

Francis referred Wednesday to the Irish culture of cover-up, but he omitted from his remarks a line in his text noting how he had prayed in Ireland for the Virgin Mary to intervene to give the church strength to “firmly pursue truth and justice.”