A judge has ordered the US State Department to review for possible release 14,900 of Hillary Clinton's emails and attachments that the FBI found when investigating her use of a private email server as secretary of state.
The judge also scheduled a Sept. 23 hearing on when to release the emails, a deadline that raises the possibility that some will become public before the Nov. 8 presidential election between Democrat Clinton and her Republican rival, Donald Trump.
Questions about her email practices as secretary of state have dogged Clinton's White House run and triggered a FBI probe that found she was "extremely careless" with sensitive information by using a private server, but recommended against bringing charges.
State Department spokesman Mark Toner today said the agency was still reviewing the 14,900 documents and it was unclear how many were personal or work-related.
He also said it was unclear how many may duplicate those already released but that there were "likely to be quite a few" not previously disclosed.
The department has already culled through some 30,068 of Clinton emails from her 2009-2013 tenure as secretary of state and released most of them, amounting to some 55,000 pages. More than 2000 emails were found to contain classified information.
The disclosure of further emails could provide more fodder for opponents who have seized on the issue to argue that Clinton is untrustworthy.
Clinton, who leads Trump in opinion polls, has said she did not compromise classified information and used a private server for convenience. She later apologised, saying: "I take responsibility."
The 14,900 documents referred to by US district court judge James Boasberg are believed to involve emails not included among those Clinton previously turned over to the State Department after her use of a private email server and private email account became public.
"This number reflects both non-record (meaning personal) and record materials (meaning work related)," said a US official who spoke on condition of anonymity.
Some of the emails were found on the servers of people with whom Clinton or her staff was communicating.