The FBI conducted a court-authorized search at John Bolton’s home as part of a national security investigation into whether he disclosed classified information in his 2020 book, according to two people familiar with the matter.

FBI agents searched the home of John Bolton, a former adviser to U.S. President Donald Trump turned persistent critic, on Friday in what a source familiar with the matter said was part of a national security probe.

The FBI has searched the Maryland home and Washington office of ex-Trump national security adviser John Bolton as part of an investigation into the handling of classified information.