Two priests, a former priest and a Catholic school teacher have been charged with sexually assaulting young boys in Philadelphia, while a former church official has been charged with child endangerment.

District Attorney Seth Williams says the charges come after a grand jury reviewed accusations referred by the Archdiocese of Philadelphia.

The charges involve sex acts that allegedly occurred from 1996 to 2000.

A former secretary of clergy is charged with felony endangerment. Prosecutors say he transferred abusive priests to new parishes with schools and youth groups without warning parish officials.

Two priests, a former priest and the teacher are charged with rape and related crimes.

A statement from Cardinal Justin Rigali says the archdiocese is cooperating with civil authorities in the investigation.