The chief executive of the nonprofit that runs college football’s Fiesta Bowl was fired Tuesday after an internal investigation alleged that the charity’s leaders urged employees to make political contributions and reimbursed them with bogus bonuses, according to The Arizona Republic, the Associated Press, and The New York Times.

John Junker, who has led the Tempe, Ariz., game for three decades, had been on administrative leave since February for refusing to cooperate with an investigative panel commissioned by the organization’s board of directors.

Natalie Wisneski, the chief operating officer, and Jay Fields, the vice president for marketing, have resigned, the Times reports.

The investigators’ report, released Tuesday, also details alleged use of Fiesta Bowl funds on trips for Arizona politicians, a lavish birthday party for Mr. Junker, and a visit to a Phoenix strip club.

The Arizona attorney general’s office is investigating whether the allegations warrant a criminal investigation, and legal experts said it is possible the organization’s tax-exempt status could be at stake.