Treasury Department investigators are probing an Aug. 15 trip taken by Secretary Steven Mnuchin Steven Terner MnuchinLawmakers fear voter backlash over failure to reach COVID-19 relief deal United Airlines, unions call for six-month extension of government aid House Democrats plan to unveil bill next week to avert shutdown MORE from New York to Washington, D.C., in which he used a government jet that cost American taxpayers at least $25,000, ABC News reported on Friday.

Mnuchin flew up to New York commercially and returned to Washington on an Air Force C-37 jet, which took less than an hour, according to the report.

The news comes as multiple Trump Cabinet officials, including Education Secretary Betsy DeVos Elizabeth (Betsy) Dee DeVosNEA president says Azar and DeVos should resign over school reopening guidance The Hill's 12:30 Report - Presented by Facebook - You might want to download TikTok now Former DeVos chief of staff joins anti-Trump group MORE and Health and Human Services Secretary Tom Price Thomas (Tom) Edmunds PriceConspicuous by their absence from the Republican Convention Coronavirus Report: The Hill's Steve Clemons interviews Chris Christie Trump flails as audience dwindles and ratings plummet MORE, are under scrutiny for their transportation.

“We welcome the [Office of the Inspector General's] review and are ensuring the office has everything needed for a full evaluation of our travel procedures," the Treasury Department said in a statement to ABC News.

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Defense Department officials told ABC News that records show Mnuchin's office had asked to use the jet, and Transportation Secretary Elaine Chao Elaine Lan ChaoChick-fil-A drops fight for San Antonio airport location Overnight Defense: US marks 19th anniversary of 9/11 attacks | Trump awards Medal of Honor to Army Ranger for hostage rescue mission | Bahrain, Israel normalizing diplomatic ties Trump marks 9/11 with moment of silence on Air Force One, remarks in PA MORE was added to the request.

The two Cabinet members were traveling back from Trump Tower, where they appeared alongside the president in a now infamous news conference in which he doubled down on his previous statement saying that "both sides" were responsible for racially charged violence in Charlottesville, Va.

The report comes after it was revealed earlier this month that the Treasury Department's inspector general was also probing a trip taken to Kentucky by Mnuchin and his wife Louise Linton aboard a government airplane, which coincided with the total eclipse last month.

ABC reported earlier this month that Mnuchin had also requested to use a government jet on his European honeymoon with Linton this summer.

The Treasury Department's Office of Inspector General is also investigating that request, which the department said was needed for a "secure line of communication."

“The Secretary is a member of the National Security Council and has responsibility for the Office of Terrorism and Financial Intelligence," the spokesman said in a statement. "It is imperative that he have access to secure communications, and it is our practice to consider a wide range of options to ensure he has these capabilities during his travel, including the possible use of military aircraft."

On Thursday, Politico reported that Price has spent some $300,000 of taxpayer money on private air travel since February, including trips to Nashville, Tenn., and Aspen, Colo.