The man who blew the whistle on alleged bribery within FIFA could himself be investigated, after a complaint from Caribbean football chiefs, Sky News reported Wednesday.

Chuck Blazer, the U.S. representative on football’s world governing body, confirmed to Sky News that he had received an inquiry from the organization’s Ethics Committee.

The inquiry was prompted by a letter, obtained by Sky News, from members of the Caribbean Football Union (CFU) and filed by the Jamaican Football Federation (JFF).

They allege that in a meeting in Zurich on May 30, Blazer made statements containing what they called “contempt and slander” against officials from his federation.

The letter goes on to question whether Blazer, who is also general secretary of Concacaf, the football federation which represents North America, Central America and the Caribbean, has violated FIFA’s code of ethics.

Blazer told Sky News: “I have received an inquiry from the secretary of the Ethics Committee to respond to a complaint filed by the Jamaica Football Federation. I will respond to the committee fully and I am confident of a positive resolution.”

Blazer’s allegations of bribery against FIFA members Jack Warner and Mohamed bin Hammam in May led to both men being temporarily suspended from all football activity pending a full investigation.