The Clinton campaign has blasted FBI Director James Comey for "blatant double standards" over the new inquiry into Hillary Clinton's email use.

The comments came after US media reports that Mr Comey had urged against publicly accusing Russia of interfering in the US election, including alleged email hacking.

Mr Comey's concern about releasing the information was due to the proximity to the election, reports say.

The FBI declined to comment to the BBC.

The statement that Mr Comey reportedly declined to sign off on was released by the Department of Homeland Security and the Office of the Director of National Intelligence on 7 October.