Report: Christopher Steele reveals FBI sources for Trump 'dossier'

The British spy behind a salacious “dossier” on President Trump has told the FBI about his sources for the document, according to a report.

Former MI6 agent Christopher Steele authored the 35-page unsubstantiated report published online in January, which alleged that blackmail against Trump was being used by Kremlin officials in an election interference plot.

Investigations into that alleged meddling have been trying to talk to Steele, who has experience in the former Soviet Union and disappeared after his dossier became public,with ABC reporting that he has now met with the FBI.

RELATED: Former British spy compiled dossier on Trump-Russia ties

He reportedly told investigators about the names of his sources, identified only by letters in the dossier.

It was not immediately clear what other information he gave.

A Washington Post report from earlier this year said that the FBI had once planned on paying Steele to continue his work looking into potential Trump-Russia connections after an intermediary brought them his alleged findings after the release of hacked Democratic National Committee emails.

The U.S. intelligence community later jointly found that hack to be part of an effort by Moscow to tilt the election towards Trump.

Steele’s reported meeting with the FBI comes as the agency, the House, the Senate and special counsel Robert Mueller all investigate the alleged meddling, with the spy’s testimony also requested in a Florida defamation suit by a Russian businessman listed in the dossier.

The man who hired the Brit to look into Trump, investigative firm Fusion GPS founder Glenn Simpson, reportedly spoke with staff for the Senate Judiciary Committee on Tuesday.

Simpson was interviewed for hours and gave the committee more than 40,000 documents, Fox News reported.

The committee had wanted the businessman to testify publicly last month, but took back a subpoena after he agreed to talk in private.