VATICAN CITY — Pope Francis accepted the resignation of a U.S. bishop Thursday and authorized an investigation into allegations he sexually harassed adults, adding awkward drama to an audience with U.S. church leaders over the abuse and cover-up scandal roiling the Catholic Church.

The resignation of West Virginia Bishop Michael Bransfield was announced just as the four-member U.S. delegation was sitting down with Francis in his private study in the Apostolic Palace. Among the four was Bransfield’s cousin, Monsignor Brian Bransfield, secretary-general of the U.S. Conference of Catholic Bishops.

The bishop had been investigated for an alleged groping incident in 2007 and was implicated in court testimony in 2012 in an infamous Philadelphia priestly sex abuse case. He strongly denied abusing anyone and the diocese said it disproved the claims. He continued in ministry until he offered to retire, as required, when he turned 75 last week.

The Vatican said Francis accepted his resignation Thursday and appointed Baltimore Archbishop William Lori to take over Bransfield’s Wheeling-Charleston diocese temporarily. Lori said in a statement that Francis had also instructed him to “conduct an investigation into allegations of sexual harassment of adults against Bishop Bransfield.”

Lori set up a hot line for potential victims to call, said the Vatican had instructed him to make the investigation public, and vowed to conduct a thorough study into what he said were “troubling” claims against Bransfield.

The revelation was the latest twist in an incredible turn of events that began with the June 20 announcement that one of the most prestigious U.S. cardinals, Theodore McCarrick, had been accused of groping a teenage altar boy in the 1970s.

Francis removed McCarrick as a cardinal in July after a U.S. church investigation found the allegation credible. After news broke of the investigation, several former seminarians and priests came forward to report that they, too, had been abused or harassed by McCarrick as adults.

The McCarrick affair — coupled with revelations in the Pennsylvania grand jury report detailing decades of abuse and cover-up in six dioceses — has fueled outrage among the rank-and-file faithful who had trusted church leaders to reform themselves after the abuse scandal first erupted in Boston in 2002.

Outrage has also been directed at Francis and the Vatican.

The head of the U.S. bishops conference, Houston Cardinal Daniel DiNardo, had requested the papal audience last month following revelations that McCarrick had risen through church ranks even though the allegations of sexual misconduct were known in U.S. and Vatican circles.

DiNardo requested a full-fledged Vatican investigation into the McCarrick affair, and said he also wanted answers to allegations that a string of Vatican officials knew of McCarrick’s misdeeds since 2000, but turned a blind eye.