Julian Assange. Ap photo
Internal correspondence to analysts at Texan intelligence think tank Statfor, published by Fairfax Media, details information from a US government source.
In the email, dated January 26, 2011, Statfor's vice-president of intelligence Fred Burton says: "We have a sealed indictment".
The information, obtained from a US government source, comes with the request not to publish.
Mr Burton is a former deputy chief of the counterterrorism division of the US State Department's diplomatic security service.
WikiLeaks has begun releasing more than five million Statfor emails, which Fairfax has accessed through its partnership with the whistleblower website.
