Australian ambassador to the U.S. Joe Hockey spoke to the FBI about the meeting between Trump campaign aide George Papadopoulos and High Commissioner to Britain Alexander Downer, in which Papadopoulos revealed that he knew that Russians had hacked Democrats' emails and had dirt on Hillary Clinton, the Sydney Morning Herald reported.

Why it matters: The ambassador considered Downer's revelations of Russian hacking important enough to contact the bureau. Now the Australian government is annoyed that Downer's identity has been revealed as the source of the information because of leaks from U.S. officials, according to the Morning Herald.

Go deeper: The New York Times first reported on the meeting between Papadopoulos and Downer.