VATICAN CITY (AP) — Pope Francis told newly ordained bishops Saturday that they must reject all forms of abuse and work in communion to fight the clerical culture that has fueled the sex abuse and cover-up scandal rocking his papacy.

Francis cited his recent letter about combatting abuse during an audience with 74 new bishops from 34 countries in the developing world. The bishops are in Rome this week to learn how to lead their dioceses.

Their seminar has come during a moment of crisis for Francis, accused by a lone archbishop of having covered up for a disgraced ex-cardinal, who in turn has been accused of sexually molesting children as well as adult seminarians.

Francis has ignored calls from clergy and ordinary faithful to respond directly to the claims, saying there are times when "silence and prayer" are the best response.

Francis did however speak generally about the abuse crisis to the new bishops, many of whom hail from dioceses where the clerical sex abuse scandal hasn't erupted publicly in the same way that it has in the Anglo-Saxon world, Europe, and parts of Latin America.

"Just say no to abuse — of power, conscience or any type," Francis said, adding that to do so they must reject the clerical culture that often places clergy on a pedestal and which Francis himself has blamed for fueling the scandal.

Francis also told the new bishops they are there to serve their flocks, and must work in communion with the church, not as lone actors.

"The bishop can't have all the gifts — the complete set of charisms — even though some think they do, poor things," Francis said. The church, he said, needs unity of bishops "not lone actors working outside the chorus, conducting their own personal battles."

It was perhaps an indirect swipe at Archbishop Carlo Maria Vigano, who broke with centuries of Vatican protocol and pontifical secret to name names and denounce two decades of cover-up by top Vatican bishops, cardinals and popes of the misconduct by ex-Cardinal Theodore McCarrick.

Vigano's bombshell accusations have plunged the papacy into crisis, with a steady trickle of revelations coming out about who knew what and when about McCarrick — and what they did with that information.

On Friday, Catholic News Service, the news agency of the U.S. bishops' conference, published a 2006 letter from a top Vatican official confirming that the Holy See knew as early as 2000 about McCarrick's penchant for inviting seminarians into his bed.

The letter, from now-Cardinal Leonardo Sandri, confirmed a key part of Vigano's testimony: That a New York City priest, the Rev. Boniface Ramsay, had written the Vatican's U.S. ambassador in November 2000 complaining about McCarrick's behavior.

Previously, there were reports that a group of concerned Americans had travelled to the Vatican in 2000 to complain about McCarrick, and Ramsay himself had said he had written the letter in 2000.

But the documentary evidence of Sandri's 2006 missive confirms that Ramsay's 2000 letter had indeed arrived in the Vatican, hadn't been lost in a pile of mail or ignored, and was still so present and relevant six years later that Sandri cited it in a simple request to Ramsay for information about a job applicant.

Vatican watchers have compared the McCarrick cover-up scandal to that of the Rev. Marcial Maciel, the 20th-century Catholic Church's most notorious pedophile whose sex crimes against children were ignored for decades by a Vatican more impressed by his ability to bring in donations and vocations.

Like Maciel, McCarrick was a powerful and popular prelate who funneled millions in donations to the Vatican. He apparently got a calculated pass for what many in the church hierarchy would have either discounted as ideological-fueled rumor or brushed off as a mere "moral lapse" in sleeping with adult men.

Francis in July accepted McCarrick's resignation as a cardinal after a U.S. church investigation determined that an allegation he fondled a teen-age altar boy in the 1970s was credible.

McCarrick's lawyer has said the allegations against him are serious and that he intends to invoke his right to due process at the appropriate time.

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