The federal prosecutor who is looking into the origins of the Russia investigation has begun looking into former CIA Director John Brennan John Owen BrennanJournalism or partisanship? The media's mistakes of 2016 continue in 2020 Comey on Clinton tweet: 'I regret only being involved in the 2016 election' Ex-CIA Director Brennan questioned for 8 hours in Durham review of Russia probe MORE, The New York Times reported Thursday, citing three people briefed on the matter.

U.S. Attorney John DurhamJohn DurhamSteele Dossier sub-source was subject of FBI counterintelligence probe Barr's Russia investigator has put some focus on Clinton Foundation: report Top Democrats call for DOJ watchdog to probe Barr over possible 2020 election influence MORE, who is leading the inquiry, has asked for Brennan's emails, call logs and other documents, a person told the Times.

He is reportedly seeking to learn what Brennan told other officials about the CIA's opinion of a now-infamous dossier that made claims about Russia and figures in President Trump Donald John TrumpBiden says voters should choose who nominates Supreme Court justice Trump, Biden will not shake hands at first debate due to COVID-19 Pelosi: Trump Supreme Court pick 'threatens' Affordable Care Act MORE's orbit.

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The Times reported that Durham is also looking at whether Brennan privately contradicted comments he made about the dossier and conclusions about Russian interference.

The people told the paper that the investigation was ongoing and it was not clear whether any crimes had been found.

Brennan has previously told MSNBC that he would answer questions from Durham if they were asked.

“I feel good about what it is we did as an intelligence community, and I feel very confident and comfortable with what I did, so I have no qualms whatsoever about talking with investigators who are going to be looking at this in a fair and appropriate manner,” he reportedly said.

Politico previously reported that investigators would look into the CIA's actions when Brennan was at its helm.

Earlier this month, a report was released on an internal watchdog probe on FBI surveillance during the 2016 campaign. It found that the decision to investigate Trump campaign associates was not motivated by political bias but found “significant inaccuracies and omissions” in the bureau's application to monitor a Trump campaign official.