Jacqueline Kennedy-Onassis believed Vice President Lyndon B. Johnson was behind the assassination of her husband, according to tapes recorded by the former first lady just months after President John F. Kennedy's death, the Daily Mail reported.

The tapes, which are set to be released by ABC News, reportedly reveal that Kennedy-Onassis believed the then-vice president Johnson, along with businessmen in the South, planned the Nov. 22, 1963, assassination of her husband in Dallas, Texas.

"The tabloid reports about the content of the tapes are totally erroneous," an ABC News spokesperson said in a statement to FoxNews.com. "ABC News isn't releasing any content from those tapes until mid-September at which point it will be clear how off base these reports are. The actual content of the tapes provide unique and important insight into our recent past from one of the most fascinating and influential First Ladies in American history."     

Kennedy-Onassis thought gunman Lee Harvey Oswald -- long believed to be a lone assassin -- was part of a larger conspiracy involving Johnson, according to the Daily Mail.