Muhammad Ali monitored by the FBI over Muslim ties

Back in 1966, the FBI was keeping watch over Muhammad Ali. They were investigating the Nation of Islam and were keen to keep an eye on him after his speech at a Miami mosque.

This is all according to newly released FBI documents that were put up on the FBI website.

Ali died in June at the age of 74. All the big names came out to honor him after his passing, even Bill Clinton was at his funeral.

The FBI has a long history of monitoring public figures. They closely watched Martin Luther King Jr as well as John Lennon in the 60's and 70's.

See the iconic athlete throughout his career:

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Muhammad Ali through the years
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Muhammad Ali through the years
American boxer and sometime actor Muhammad Ali (then Cassius Clay) as Eric Sevareid interviews him during an episode of the CBS Evening News, New York, March 24, 1964. (Photo by CBS Photo Archive/Getty Images)
LAS VEGAS - OCTOBER 2,1980: Muhammad Ali (L) throws a punch against Larry Holmes during the fight at Caesars Palace, on October 2,1980 in Las Vegas, Nevada. Larry Holmes won the WBC heavyweight title by a RTD 10. (Photo by: The Ring Magazine/Getty Images)
JUL 14 1981; Ali, Muhammad (Boxer) - Ind.; (Photo By Lyn Alweis/The Denver Post via Getty Images)
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The documents released about Ali were classified for years. They were only released after conservative group Judicial Watch sued them for access to the papers.

In the documents, there are requests for agents to monitor his divorce from his first wife. They claimed this was a "lead."

"The Miami (FBI) office is requested to follow the divorce action between Cassius and Sonja Clay with particular emphasis being placed on any NOI (Nation of Islam) implication being brought into this matter," according to one document.

A different document covers him speaking at a mosque in 1966. In his speech, he discussed efforts to strip him of his boxing title and he blamed the "white man."

The biggest controversy concerned his conscientious objector status during the Vietnam War. He was stripped of his boxing title in 1967 for his refusal to go to war.

The FBI documents stress that Ali was never under investigation personally.

Look back at Ali's funeral:

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Muhammad Ali's funeral procession through Louisville
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Muhammad Ali's funeral procession through Louisville
A mourner throws a rose onto the hearse carrying the body of the late Muhammad Ali as it enters Cave Hill Cemetery in Louisville, Kentucky, U.S. June 10, 2016. REUTERS/John Sommers II
LOUISVILLE, KY - JUNE 10: Police wait the hearse carrying the body of Muhammed Ali to pass by his childhood home on June 10, 2016 in Louisville, Kentucky. The funeral possession wound through Louisville, preceding a memorial service and giving the public an opportunity to honor the four-time world heavyweight boxing champion, who died on June 3 at age 74. (Photo by John Moore/Getty Images)
LOUISVILLE, KY - JUNE 10: People wait along the childhood street of Muhammed Ali for his funeral procession to pass by on June 10, 2016 in Louisville, Kentucky. The procession preceded a memorial service, giving the public an opportunity to honor the four-time world heavyweight boxing champion. Ali died on June 3 at age 74. (Photo by John Moore/Getty Images)
LOUISVILLE, KY - JUNE 10: People get their picture taken in front of Muhammad Ali's childhood home on Grand Avenue on June 10, 2016 in Louisville, Kentucky. The funeral procession for Ali will be traveling over 20 miles on a designated route throughout Louisville. The four-time world heavyweight boxing champion died on June 3 at age 74. (Photo by Ty Wright/Getty Images)
LOUISVILLE, KY - JUNE 10: Friends and family of Muhammad Ali shake hands with people in the crowd lining Grand Avenue as the funeral procession motorcade drives in front Ali's childhood home on June 10, 2016 in Louisville, Kentucky. The funeral procession for Ali was traveling over 20 miles on a designated route throughout Louisville on the way to Cave Hill Cemetery. The four-time world heavyweight boxing champion died on June 3 at age 74. (Photo by Ty Wright/Getty Images)
LOUISVILLE, KY - JUNE 10: Brown Rawls (man middle) and his family have their photo taken in front of a Muhammad Ali back drop in the front yard of house down the street from his childhood home on Grand Avenue on June 10, 2016 in Louisville, Kentucky. The funeral procession for Ali will be traveling over 20 miles on a designated route throughout Louisville. The four-time world heavyweight boxing champion died on June 3 at age 74. (Photo by Ty Wright/Getty Images)
Brandon Liggons, 2, (L) holds an image of Muhammad Ali during the funeral procession for the three-time heavyweight boxing champion in Louisville, Kentucky, U.S., June 10, 2016. REUTERS/Lucy Nicholson
LOUISVILLE, KY - JUNE 10: People stand in front of Muhammad Ali's childhood home on Grand Avenue on June 10, 2016 in Louisville, Kentucky. The funeral procession for Ali will be traveling over 20 miles on a designated route throughout Louisville. The four-time world heavyweight boxing champion died on June 3 at age 74. (Photo by Ty Wright/Getty Images)
Jerry Martin walks his horse, Rekoa, fashioned as a riderless horse, outside boxing legend Muhammad Ali's childhood home where mourners wait to pay their respects during a funeral procession on June 10, 2016 in Louisville, Kentucky. Thousands of people from near and far were expected to line the streets of Muhammad Ali's hometown Louisville on Friday to say goodbye to the boxing legend and civil rights hero, who mesmerized the world with his dazzling skills. / AFP / JIM WATSON (Photo credit should read JIM WATSON/AFP/Getty Images)
A man walks down the street with a huge painting of boxing legend Muhammad Ali outside his childhood home where mourners wait to pay their respects to a funeral procession on June 10, 2016 in Louisville, Kentucky. Thousands of people from near and far were expected to line the streets of Muhammad Ali's hometown Louisville on Friday to say goodbye to the boxing legend and civil rights hero, who mesmerized the world with his dazzling skills. / AFP / JIM WATSON (Photo credit should read JIM WATSON/AFP/Getty Images)
People sit in lawn chairs outside boxing legend Muhammad Ali's childhood home where mourners wait to pay their respects during a funeral procession on June 10, 2016 in Louisville, Kentucky. Thousands of people from near and far were expected to line the streets of Muhammad Ali's hometown Louisville on Friday to say goodbye to the boxing legend and civil rights hero, who mesmerized the world with his dazzling skills. / AFP / JIM WATSON (Photo credit should read JIM WATSON/AFP/Getty Images)
A woman places flower peddles along the entrance to Cave Hill Cemetery for the funeral procession for boxing legend Muhammad Ali on June 10, 2016 in Louisville, Kentucky. Ali will be laid to rest Friday, the culmination of a two-day farewell for the beloved boxing legend and civil rights hero who electrified crowds the world over. / AFP / Brendan Smialowski (Photo credit should read BRENDAN SMIALOWSKI/AFP/Getty Images)
Two men hold up placards reading 'Me, We', a quote by boxing legend Muhammad Ali as they wait outside his childhood home with other mourners to pay their respects during a funeral procession on June 10, 2016 in Louisville, Kentucky. Thousands of people from near and far were expected to line the streets of Muhammad Ali's hometown Louisville on Friday to say goodbye to the boxing legend and civil rights hero, who mesmerized the world with his dazzling skills. / AFP / JIM WATSON (Photo credit should read JIM WATSON/AFP/Getty Images)
The coffin bearing the remains of Muhammad Ali is loaded into a hearse at the A D Porter & Sons funeral home during the funeral procession for the three-time heavyweight boxing champion in Louisville, Kentucky, U.S., June 10, 2016. REUTERS/Adrees Latif TPX IMAGES OF THE DAY
The hearse carrying the remains of Muhammad Ali leaves the A D Porter & Sons funeral home during the funeral procession for the three-time heavyweight boxing champion in Louisville, Kentucky, U.S., June 10, 2016. REUTERS/Adrees Latif
People wait to view a procession for boxing legend Muhammad Ali pass on the way to Cave Hill Cemetery June 10, 2016 in Louisville, Kentucky. Thousands of people from near and far were expected to line the streets of Muhammad Ali's hometown Louisville on Friday to say goodbye to the boxing legend and civil rights hero, who mesmerized the world with his dazzling skills. / AFP / Brendan Smialowski (Photo credit should read BRENDAN SMIALOWSKI/AFP/Getty Images)
Thirteen-year-old Malik Parker shadow boxes outside boxing legend Muhammad Ali's childhood home where mourners wait to pay their respects during a funeral procession on June 10, 2016 in Louisville, Kentucky. Thousands of people from near and far were expected to line the streets of Muhammad Ali's hometown Louisville on Friday to say goodbye to the boxing legend and civil rights hero, who mesmerized the world with his dazzling skills. / AFP / JIM WATSON (Photo credit should read JIM WATSON/AFP/Getty Images)
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