House Intelligence Committee lawmakers are in the dark about an investigation into wrongdoing at the State Department announced by Chairman Devin Nunes Devin Gerald NunesSunday shows preview: With less than two months to go, race for the White House heats up Sunday shows preview: Republicans gear up for national convention, USPS debate continues in Washington Sunday shows preview: White House, congressional Democrats unable to breach stalemate over coronavirus relief MORE (R-Calif.) on Friday.

Democrats on the committee say Nunes has refused to brief them on the probe, which he described as “phase two” of his investigation into alleged surveillance abuse at the Department of Justice. Senior members say they learned of the investigation when Nunes announced it on Fox News.

And some committee Republicans appear to know little more than the Democrats.

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Rep. Mike Conaway Kenneth (Mike) Michael ConawayLive coverage: Democrats, Republicans seek to win PR battle in final House impeachment hearing Laughter erupts at hearing after Democrat fires back: Trump 'has 5 Pinocchios on a daily basis' Live coverage: Schiff closes with speech highlighting claims of Trump's corruption MORE (R-Texas), the No. 2 Republican on the panel, said he had been briefed on “some of the priorities” of the probe but said he believes Nunes will lead the investigation. Rep. Tom Rooney Thomas (Tom) Joseph RooneyHouse Dem calls on lawmakers to 'insulate' election process following Mueller report Hill-HarrisX poll: 76 percent oppose Trump pardoning former campaign aides Dems fear Trump is looking at presidential pardons MORE (R-Fla.), who along with Conaway is leading the panel’s investigation into Russian interference in the presidential election, throughout the week has said he doesn’t know what the focus of the new probe will be.

“He hasn’t talked to me about that,” Rooney said Monday, several days after Nunes announced the inquiry into State.

Some key Republicans insist that the new focus on State is nothing more than the committee exercising its oversight powers.

One member called the characterization of the State inquiries as a new investigation “a garble.”

Rep. Trey Gowdy Harold (Trey) Watson GowdySunday shows preview: Election integrity dominates as Nov. 3 nears Tim Scott invokes Breonna Taylor, George Floyd in Trump convention speech Sunday shows preview: Republicans gear up for national convention, USPS debate continues in Washington MORE (R-S.C.), who was intimately involved in the creation of the surveillance memo released by Republicans and is participating in the inquiry into the State Department, also doesn’t view what Nunes is doing as a “phase II,” according to an aide, but rather an ongoing examination.

“It’s not Devin launching another investigation,” Rep. Chris Stewart Christopher (Chris) Douglas StewartAtlanta Wendy's 911 call the night of Rayshard Brooks's death released Tyler Perry offers to pay for funeral of Rayshard Brooks Current, former NHL players form diversity coalition to fight intolerance in hockey MORE (R-Utah) said. “We’re aware of it, we’ve talked about it, it’s just something that we know as much about at this point. That’s not because Devin has kept from us, it’s just we don’t know that much about it yet.”

Despite expressing some private uncertainty about the future of the committee’s expanding investigative purview, Republicans did not suggest they were being deliberately excluded from Nunes’s plans.

Democrats repeatedly pressed Nunes on the scope of his investigation into State in a bitter closed-door Monday meeting, the transcript of which was released on Friday. Nunes did not address the matter.

The apparent confusion comes as Democrats have accused Nunes — they suggest perhaps alone — of breaking committee rules by launching new investigations without briefing the minority.

"What you can glean from the process, in what he is saying, is this is not a committee activity, this is a Devin Nunes activity or arguably maybe a majority activity,” Rep. Jim Himes James (Jim) Andres HimesMany Democrats want John Bolton's testimony, but Pelosi stays mum SEC's Clayton demurs on firing of Manhattan US attorney he would replace Democrats face tough questions with Bolton MORE (D-Conn.) said Thursday. “But again, none of the Democrats to my knowledge have been briefed on this.”

Ranking member Adam Schiff Adam Bennett SchiffTop Democrats call for DOJ watchdog to probe Barr over possible 2020 election influence Overnight Defense: Top admiral says 'no condition' where US should conduct nuclear test 'at this time' | Intelligence chief says Congress will get some in-person election security briefings Overnight Defense: House to vote on military justice bill spurred by Vanessa Guillén death | Biden courts veterans after Trump's military controversies MORE (D-Calif.), during Monday’s meeting, called the investigation “a farce.”

Nunes, backed by other Intelligence Committee Republicans, last week used an obscure House rule to release a controversial memo accusing the FBI and Justice Department of abusing U.S. surveillance powers during the 2016 presidential election.

The incident further inflamed partisan tensions on a panel that has struggled to maintain any semblance of bipartisanship during the Russia investigation.

In yet another signal of the increasingly toxic atmosphere in the committee’s secure office spaces, rumors swirled around the Capitol on Thursday that Nunes is considering building a physical barrier between the minority and majority staff in what is known as “the bullpen,” the open floor space where committee staff work.

“[The House Intelligence Committee] is poison right now,” Rooney said Thursday, who noted that he didn’t know anything about the rumors of segregating staff.

But, he said, “the fact that we might be building a wall just goes to show you how bad it is. The level of trust is just gone.”

Nunes told Fox News on Friday that, “we are in the middle of what I call phase two of our investigation.”

"That investigation is ongoing and we continue work toward finding answers and asking the right questions to try to get to the bottom of what exactly the State Department was up to in terms of this Russia investigation," he told Bret Baier.

Since then, GOP lawmakers have been quietly buzzing about allegations that an Obama-era State Department official passed along information from allies of former Secretary of State Hillary Clinton Hillary Diane Rodham ClintonWhat Senate Republicans have said about election-year Supreme Court vacancies Bipartisan praise pours in after Ginsburg's death Trump carries on with rally, unaware of Ginsburg's death MORE that may have been used by the FBI to launch an investigation into whether the Trump campaign had improper contacts with Russia.

"I'm pretty troubled by what I read in the documents with respect to the role the State Department played in the fall of 2016, including information that was used in a court proceeding. I am troubled by it," Gowdy told Fox News on Tuesday.

Nunes has declined to go into the details of his probe in a handful of conservative media appearances in recent days.

He declined to answer any questions on Thursday. A spokesman also did not respond to requests for comment on this story.