The FBI said Tuesday it would expect Congress to obtain approval before releasing any of the documents the agency has turned over to lawmakers about Hillary Clinton's use of a private email server while serving as Secretary of State.
The statement came hours after the FBI sent Congress a report it had provided to the Justice Department last month to explain why it recommended no charges in the Clinton email server investigation.
In a statement, the FBI said the material it had provided to Congress contains "classified and other sensitive information and is being provided with the expectation it will not be disseminated or disclosed without FBI concurrence.”
The decision to provide the investigative material on a case in which charges were not brought is exceedingly rare. The report includes notes from the interviews of Clinton and other witnesses in the investigation.
The notes, called 302s, represent an FBI agent's memos on the interviews and will be provided along with other investigative material.
The letter reiterates FBI Director James Comey's assertion last month that it was not clear whether Clinton deliberately received classified information on her private email server.
A day after Comey announced he would recommend that Clinton not be indicted for the private email affair, U.S. Attorney General Loretta Lynch accepted the recommendation.
Clinton has said she used private emails out of "convenience", though she has also admitted it "would have been better" to have two accounts to separate work and personal emails.