Attorney General Jeff Sessions is set to unveil within days a number of criminal leak investigations, The Washington Post reported.
The probes will be centered around news reports that have contained sensitive material about intelligence, the Post reported.
The news comes as newly appointed White House communications director Anthony Scaramucci declared he was prepared to "fire everybody" to stop information leaks from the press office – and amid President Donald Trump's public criticism of Sessions.
Trump has recently railed at "leaks against us."