HARRISBURG, Pennsylvania (Reuters) - Former Penn State University President Graham Spanier will be charged with perjury and obstruction offenses in the coverup of the Jerry Sandusky child sex abuse scandal, a source familiar with the matter said Thursday.

Prosecutors have also prepared new charges against two other former officials, Athletic Director Tim Curley and Vice President Gary Schultz, who have already been indicted in the Sandusky case, the source said on condition of anonymity.

Spanier will face five charges, the source said, including perjury, obstruction, conspiracy and child endangerment.

News of the charges was first reported by NBC.

Curley and Schultz have been previously charged with perjury and for failing to report an allegation of child abuse to the proper authorities. Both have pleaded not guilty.

Each of them faces four additional charges in the case, the source said.

NBC reported on its "Today" show, that the charges are based in part on emails uncovered during an investigation the university commissioned by former FBI Director Louis Freeh, whose report on the Sandusky scandal was issued over the summer.

Spanier, the only major figure in the scandal not yet facing criminal prosecution, resigned as head of Penn State in the wake of the charges against Sandusky, who was convicted in June of sexually abusing 10 boys over a 15-year period. Sandusky is serving a sentence of 30 to 60 years.

Calls for comment to Penn State and to attorneys for Spanier, Schultz and Curley were not immediately returned.

The Pennsylvania attorney general's office, which has been prosecuting the Sandusky cases, declined to comment.