CHAPEL HILL (AP) -- Football players at North Carolina made up more than a third of enrollments in suspect classes within a department the school investigated for academic fraud.

The school says football players represented 246 of 686 enrollments (36 percent) in the 54 courses within the Department of African and Afro-American Studies between summer 2007 and summer 2011. Those classes lacked supervision or had irregular contact between instructors and students.

Men's basketball players represented 23 enrollments, roughly 3 percent, during that span.

The university released a report Friday outlining fraud and poor oversight within the department, though no favorable treatment for student-athletes or grades awarded without written work.

The probe was a result of an NCAA investigation into the football program.

The News and Observer of Raleigh first reported the enrollment figures Monday.