(CNN) In the latest scathing allegation against the Catholic church, Pennsylvania's attorney general said the Vatican knew about a cover-up involving sex abuse allegations against priests.

"We have evidence that the Vatican had knowledge of the cover-up," Attorney General Josh Shapiro told NBC's "Today" show Tuesday.

He later told CNN's Wolf Blitzer, "Once the Vatican learned of it, I do not know if the Pope learned about it or not."

The accusation comes two weeks after the release of a grand jury report saying hundreds of "predator priests" had abused children in six Pennsylvania dioceses over the past seven decades.

Shapiro did not specify Tuesday what evidence he has that would suggest the Vatican knew of a cover-up.