HARRISBURG — The source of a $125,000 contribution to the failed gubernatorial campaign of former Pennsylvania Treasurer Rob McCord remains a mystery, more than eight months after it was given, a state official said Thursday.

The Enterprise Fund, the political action committee that gave the money, has ignored requirements since June to disclose the source of the money, according to the Department of State, which administers state election and campaign finance reporting laws.

The agency last year assessed the maximum $500 in late filing fees to the Enterprise Fund, which has not paid the fine, a Department of State spokesman said Thursday.

The federal government apparently has also shown an interest in the Enterprise Fund.

A person familiar with the request told The Associated Press federal investigators sought information from the Treasury Department about the Enterprise Fund late last year. The person spoke on condition of anonymity because the person did not want to be identified discussing an investigative matter that, thus far, has not been discussed publicly by the authorities.

McCord resigned last week as Pennsylvania’s elected state treasurer and signed an agreement in federal court to plead guilty to extortion charges for using his office to try to strong-arm contributions to his gubernatorial campaign. McCord is due in federal court in Harrisburg on Feb. 17.

Department of State records show that lawyer John H. Estey submitted paperwork in 2013 to create the Enterprise Fund.