A Pennsylvania grand jury report issued on Wednesday paints a picture of a Catholic Church in six of the state's dioceses that for decades handled claims of sex abuse of minors under its care by hiding the allegations and brushing aside its victims.

More than 300 priests were linked to abuse claims and over 1,000 victims were identified, said Pennsylvania Attorney General Josh Shapiro in a news conference following the report's release.

"The main thing was not to help children but to avoid 'scandal,'" says a biting sentence about the behaviour of Church leaders and officials in the report, detailing a months-long investigation of clergy sex abuse claims in the dioceses of Pittsburgh, Harrisburg, Allentown, Scranton, Greensburg and Erie.