The Federal Bureau of Investigation (FBI) in recently released documents detailed the threat of assassination of Queen Elizabeth II during her visit to the United States in the 1980s, writes The Hill.

The 102-page document states, citing a source from the San Francisco Police Department, that on February 4, 1983, an unnamed man telephoned to say that his daughter had been killed with a rubber bullet in Northern Ireland and that he planned to harm.

The man said he plans to either drop an object from the Golden Gate Bridge onto the royal yacht Britannia as she sails under it, or try to kill the queen during her visit to Yosemite National Park. The document does not indicate whether any arrests were made in connection with this call..

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The Queen and Prince Philip visited then-President Ronald Reagan and First Lady Nancy Reagan at their home, known as " The president and first lady also hosted the royal couple at an official dinner at the de Young Museum in San Francisco..

The document also shows extensive security planning by various law enforcement agencies in the event of protests and potential threats during the Queen's visit in 1983 and others..

The FBI notes that the source of the assassination attempt was a regular at the Dovre Club in San Francisco, known as the "

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Queen Elizabeth's visit in 1983 came at a time of three decades of conflict in Northern Ireland known as the " In particular, Louis Mountbatten, uncle of Prince Philip, died in 1979 as a result of the fact that members of the IRA planted a bomb on his yacht..

The Unionists wanted Northern Ireland to remain part of the UK, while the Republicans and Nationalists wanted the country to leave the UK and reunite with Ireland..

The conflict ended in 1998 with the signing of the Good Friday Agreement..

Queen Elizabeth II died in 2022. On May 6, 2023, her son, Charles III, ascended the throne..