FBI reveals chilling death threats to Nelson Mandela during 1990 US visit

The FBI investigated death threats against Nelson Mandela during his 1990 visit to the United States and relied on an informant for details about the anti-apartheid leader's trip, according to newly released documents.

The FBI released hundreds of pages of records tied to the visit of Mandela, which came months after he was released from a 27-year prison sentence in South Africa and four years before he became president.

One death threat came in a handwritten note that says, in part, "Remember John F. Kennedy in Dallas???"

One threatening caller said he was from the Aryan Knights and that there were two bombs along a New York parade route, another warned of a "hit squad" and a threat was also phoned into a Georgia university where Mandela was scheduled to address a rally, the documents revealed.

"The caller stated that he and his two companions had spent their lives trying to stop Mandela," reads a memo about a threat received by the Georgia Institute of Technology.

"He stated that they had various weapons and means with which to accomplish this task and had received military training." The call was not traced and no further information about it was available, the memo states.