HARRISBURG, Pa. (AP) — More than 1,000 children — and possibly many more — were molested by hundreds of Roman Catholic priests in six Pennsylvania dioceses, while senior church officials took steps to cover it up, according to a landmark grand jury report released Tuesday.

The grand jury said it believes the “real number” of abused children might be “in the thousands” since some records were lost and victims were afraid to come forward. The report said more than 300 clergy committed the abuse over a period decades, beginning in the mid-1950s.