OKLAHOMA CITY (AP) - An Oklahoma City school principal has resigned following an investigation into alleged grade tampering.

Superintendent Karl Springer said Wednesday he has accepted the resignation of Douglass Mid-High School Principal Brian Staples. The resignation is effective Nov. 15.

Staples was placed on administrative leave Oct. 10 pending the outcome of an investigation into allegations presented to officials by students and former district employees in June. Springer says the investigation is now complete and the results have been sent to federal and state school officials and to Oklahoma County prosecutors for review.

School officials say the investigation found no infractions that would affect athletic eligibility at Douglass Mid-High School.

A telephone call to a number listed for Staples was not answered and no recording device was activated to leave a message.