Legendary boxer Muhammad Ali was the target of an FBI investigation for allegedly fixing two of his heavyweight title bouts with challenger Leon Spinks, Breaking Celebrity News has exclusively learned.

After pouring through more than 600 pages of government documents, Breaking Celebrity News can now blow the lid off the files to reveal the explosive dirt the FBI had on one of the country's most beloved sports figures, who died last summer at 74.

The most shocking revelation details the Criminal Investigative Division's probe into allegations that Ali and Spinks fixed their two infamous 1978 fights.

Spinks stunned the boxing world by beating the champ during the first fight in February 1978 in Nevada