Thousands of mobile phones used by the FBI were impacted by a glitch that resulted in the loss of text exchanges between bureau employees Peter Strzok and Lisa Page, Fox News reported on Wednesday.

Page and Strzok, who until recently were part of special counsel Robert Mueller Robert (Bob) MuellerCNN's Toobin warns McCabe is in 'perilous condition' with emboldened Trump CNN anchor rips Trump over Stone while evoking Clinton-Lynch tarmac meeting The Hill's 12:30 Report: New Hampshire fallout MORE’s investigation into Russian interference in the 2016 election, have been under intense scrutiny from GOP lawmakers after it was revealed that they exchanged messages critical of President Trump Donald John TrumpUS reimposes UN sanctions on Iran amid increasing tensions Jeff Flake: Republicans 'should hold the same position' on SCOTUS vacancy as 2016 Trump supporters chant 'Fill that seat' at North Carolina rally MORE — as well as other candidates — ahead of the 2016 election.

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Strzok was removed from the Russia probe last year, after the text messages were uncovered by a Justice Department inspector general investigation. But Republicans point to the messages as evidence of political bias on Mueller’s team and at the FBI.

The missing messages have sparked furor among Republicans on Capitol Hill who are demanding answers as to why the bureau did not preserve those from the time period between Dec. 14, 2016, and May 7, 2017. The revelation has also triggered a Justice Department investigation.

The bureau recently told the inspector general that the messages were not preserved as a result of misconfiguration issues related to software upgrades of FBI-provided Samsung 5 mobile phones that conflicted with the bureau’s archiving efforts.

Fox News, citing anonymous law enforcement officials, is now reporting that the glitch affected close to 10 percent of cellphones used by bureau employees.

The FBI has a workforce of more than 35,000 agents, analysts and other employees.

Justice Department officials are working to recover the lost messages from cellphone carriers and also trying to recover the devices themselves, Fox reported.

The text messages attracted massive attention when the Justice Department delivered them to members of the House Judiciary Committee in mid-December. The exchanges showed the agents referring to then-candidate Trump as an “idiot,” in addition to other derogatory terms.

On Tuesday, Sens. Ron Johnson Ronald (Ron) Harold JohnsonThe Hill's Morning Report - Sponsored by The Air Line Pilots Association - White House moves closer to Pelosi on virus relief bill Second GOP senator to quarantine after exposure to coronavirus GOP-led panel to hear from former official who said Burisma was not a factor in US policy MORE (R-Wis.) and Chuck Grassley Charles (Chuck) Ernest GrassleySenate Republicans face tough decision on replacing Ginsburg What Senate Republicans have said about election-year Supreme Court vacancies Biden says Ginsburg successor should be picked by candidate who wins on Nov. 3 MORE (R-Iowa), chairmen of the powerful Oversight and Government Reform and Judiciary committees, sent a letter to the Justice Department inspector general demanding to know why he only now disclosed the missing text messages. Lawmakers have asked to see exchanges from the period between Nov. 30, 2016, and July 28, 2017.

Attorney General Jeff Sessions Jefferson (Jeff) Beauregard SessionsTrump's policies on refugees are as simple as ABCs Ocasio-Cortez, Velázquez call for convention to decide Puerto Rico status White House officials voted by show of hands on 2018 family separations: report MORE has vowed to “leave no stone unturned” in investigating the issue.