CHAPEL HILL, N.C. (AP) - Three months after the NCAA hit North Carolina's football program with sanctions, the school is still cleaning up the lingering mess that has become more than just an athletics issue.

In the past month, a university investigation launched amid the football probe into improper benefits and academic misconduct revealed embarrassing irregularities and suspect classes in an academic department.

Football players made up more than a third of enrollments in those suspect classes, including one last summer made up solely of current football players and one former player.

The board that oversees the 17-campus University of North Carolina public system has appointed a four-member panel to review the school's investigation. System president Thomas W. Ross says officials are working ``to make sure we have gotten to the bottom of this.''