MISSION, Kan. (AP) _ The NCAA said Thursday that it extended the probation of the University of Tennessee while it investigates published reports of violations of rules and a cover-up in the school's 1986 investigation of the football program.

The probation imposed last year was scheduled to end Oct. 9. It was extended indefinitely.

The NCAA said its enforcement staff would investigate the reports of violations at the request of the university.

The NCAA would not comment further and did not say how long it expected the investigation to take.