HUNTSVILLE, Ala. -- Disciplinary action has been taken against an Alabama A and M University professor who offered to raise students' grades for donations to a fund for victims of the recent Virginia Tech shootings, a university official said.

Alabama A and M Provost Beverly Edmond said in a statement that an investigation concluded the unidentified professor "used very poor judgment."

Edmond said the investigation found that the professor made the offer to students who made $3 contributions.

About nine students donated a total of $32, which was returned to the students.

Edmond said the professor's final grades were reviewed to ensure they were based solely on the students' classroom performance.

"The investigation determined that this was an unfortunate but isolated incident," she said.

The investigation didn't prevent any of the students from taking part in commencement exercises.