The FBI kept tabs on the late boxer Muhammad Ali in 1966, including his divorce and his speech at a Miami mosque, in its investigation of the religious group Nation of Islam, according to documents released by the agency.
The release of the documents, recently posted on the website of the Federal Bureau of Investigation, was first reported by The New York Times online on Thursday.
The former heavyweight boxing champion died in June at age 74, after a life in the ring and in activism that made him one of the world's most famous celebrities. Former President Bill Clinton was among the dignitaries at his funeral.