A Fife pensioner is facing allegations that she threatened to kill Prime Minister Theresa May and also sent e-mails claiming there were bombs at two U.S. embassies.
Another charge alleges that 72-year-old Isabella Jackson was also behind a bomb scare at the Harrods store in London.
The death threats against Mrs May were made in 2014 when she was Home Secretary.
The Government Communications Headquarters (GCHQ) was involved in the investigation.
Jackson, of Braehead Gardens, Buckhaven, faces five charges.
It is alleged that on November 24, 2014, she behaved in a threatening or abusive manner at the Palace of Westminster, her Fife home, or elsewhere in Scotland by threatening to kill Theresa May.
A second charge alleges that on the same day at GCHQ, Cheltenham, at her home or elsewhere in Scotland, she threatened to kill Mrs May.
It is also alleged that between December 13, 2014 and January 7, 2015 at her home, the U.S. embassies in London and Paris and GCHQ, she repeatedly communicated by e-mail with the intent of inducing the false belief that bombs were present in the embassies.
Jackson is accused of sending a message to Fife Council between August 30 and September 10, 2015 falsely stating that Susan Johnston had died to cause her annoyance, inconvenience and needless anxiety.
It is further alleged that on September 14, 2015 she communicated by e-mail with the intent of inducing the false belief that there was a bomb at Harrods in Knightsbridge, London.
The first diet will call at Kirkcaldy Sheriff Court on Tuesday and a sheriff and jury trial is scheduled for September 12.