Former FBI acting Director Brian Driscoll and two other former senior officials who were fired without cause last month sued the administration of U.S. President Donald Trump on Wednesday, alleging they were dismissed in a "campaign of retribution" that targeted officials viewed as insufficiently loyal.

The lawsuit alleges that FBI Director Kash Patel said he had been ordered to fire anyone who had worked on a criminal investigation against Trump, and that his own job depended on their removal.

"The FBI tried to put the president in jail and he hasn’t forgotten it," Patel told Driscoll, according to the lawsuit.