Bolton has not been charged with any crime. The disclosure came in response to a request in court by several media outlets seeking more information as to the basis of the search.

The white binder appears to reference U.S. military strikes in Syria that took place in April 2018, which were coordinated with the United Kingdom and France and which targeted the Assad regime’s chemical weapons infrastructure. The strikes occurred days before Bolton officially assumed his role in the Trump administration.

A copy of the warrant included in the filing authorizes the seizure of any classified or potentially classified documents relating to Bolton’s tenure as Assistant to the President for National Security Affairs, starting April 9, 2018. That time frame includes both the Syria strikes and the bulk of Bolton’s time in the White House through his high-profile departure in 2019.

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The search authorization, filed under 18 U.S. Code § 1924 and two provisions of the Espionage Act, also permitted agents to seize digital devices and communications “regarding the retrieval, storage, or transmission of classified material.” A federal magistrate judge in Maryland’s Greenbelt courthouse approved the search warrant application, which includes allegations from an FBI agent and identification of possible criminal violations prosecutors could be considering.

The investigation is believed to be related to information Bolton may have gathered as he prepared to write his 2020 book, The Room Where It Happened, which he published about the president’s handling of foreign policy during his first term. Bolton previously clashed with Trump national security officials over what classified information may have been included in the book, removing some of the information before it was published, according to prior court records.