Horowitz: 'Very concerned' about FBI leaks to Giuliani

Department of Justice Inspector General Michael Horowitz said on Wednesday that he is "very concerned" about leaks from FBI field offices to Rudy GiulianiRudy GiulianiDemocrats file brief against Trump, 'the Framers' worst nightmare' Trump lawyers attack House impeachment as 'brazen and unlawful' effort to overturn 2016 results Sunday shows preview: Lawmakers gear up for Senate impeachment trial MORE, President TrumpDonald John TrumpTrump's newest Russia adviser, Andrew Peek, leaves post: report Hawley expects McConnell's final impeachment resolution to give White House defense ability to motion to dismiss Trump rips New York City sea wall: 'Costly, foolish' and 'environmentally unfriendly idea' MORE's personal lawyer, and other individuals.

Asked by Sen. Patrick LeahyPatrick Joseph LeahyOvernight Defense: Book says Trump called military leaders 'dopes and babies' | House reinvites Pompeo for Iran hearing | Dems urge Esper to reject border wall funding request Senate Dems urge Esper to oppose shifting Pentagon money to border wall Senate opens Trump impeachment trial MORE (D-Vt.) about the appearance that Giuliani was getting "highly sensitive leaks" from the FBI's New York field office, Horowitz noted that unauthorized leaks were under investigation.

"As we noted publicly last year in our report, we were very concerned about that," Horowitz told the Senate Judiciary Committee.

"We are investigating those contacts. We've issued a couple of public summaries so far about people we've found violated FBI policy. We have other investigations ongoing," Horowitz continued.

He added that, while it has been hard to prove the substance of conversations between FBI and reporters or outside individuals, “we can prove the contacts."

"Under FBI policy, you need authorization if you're going to disclose information and have certain contacts," he said.

Former FBI Director James ComeyJames Brien ComeyNYT: Justice investigating alleged Comey leak of years-old classified info Bernie-Hillary echoes seen in Biden-Sanders primary fight Rosenstein on his time in Trump administration: 'We got all the big issues right' MORE told a House committee last year that he was concerned the FBI's New York field office was leaking to Giuliani.

“I was concerned that there appeared to be in the media a number of stories that might have been based on communications reporters or non-reporters like Rudy Giuliani were having with people in the New York field office,” Comey testified at the time.

Sen. Dick DurbinRichard (Dick) Joseph DurbinSunday shows preview: Lawmakers gear up for Senate impeachment trial Parnas pressure grows on Senate GOP Overnight Defense: Book says Trump called military leaders 'dopes and babies' | House reinvites Pompeo for Iran hearing | Dems urge Esper to reject border wall funding request MORE (D-Ill.) took a jab at Trump's lawyer on Wednesday when the topic resurfaced during the hearing.

"Mr. Giuliani now professes to be President Trump's lawyer and occasionally the president acknowledges that, sometimes he doesn't," Durbin said.

Durbin also asked Horowitz if there were "any concerns" that Giuliani is continuing to "improperly obtain" information from law enforcement sources.

Horowitz said that he was not investigating matters related to Ukraine, to which he believed Durbin was referring.

Horowitz is testifying on the IG report released this week on alleged surveillance by the FBI during the 2016 presidential campaign. The Hill is providing running updates on the hearing.

--This report was updated at 1:34 p.m.