Updated April 03, 2025 at 17:02 PM ET
The Pentagon acting Inspector General Steven Stebbins is beginning an evaluation of Defense Secretary Pete Hegseth's use of the Signal messaging app to discuss military operations.
on Thursday follows a request from the Republican chairman and the top Democrat on the Senate Armed Services Committee for a probe into the incident, which was first reported by the journalist Jeffrey Goldberg of The Atlantic. The lawmakers have voiced concern about whether Hegseth and other top national security officials shared classified information on a commercially available encrypted messaging app as they discussed a military strike against Houthi rebels in Yemen.
"If true, this reporting raises questions as to the use of unclassified networks to discuss sensitive and classified information, as well as the sharing of such information with those who do not have proper clearance and need to know," Sen. Roger Wicker, R-Miss., and Sen. Jack Reed, D-R.I., .
On Thursday, Reed said in a statement he welcomed the investigation, saying the White House and the defense secretary have "tried desperately to mislead the public about this blunder. I cannot overstate how serious of a failure it is."
Stebbins wrote that the aim of his investigation "is to determine the extent to which the Secretary of Defense and other DoD personnel complied with DoD policies and procedures for the use of a commercial messaging application for official business." The review will also examine "compliance with classification and records retention requirements," he said.
Stebbins became acting inspector general after President Trump across the government after taking office in January.
Hegseth has adamantly denied that any classified war plans were discussed in the Signal chat. Goldberg reported that Hegseth shared information about targets, weapons and attack sequencing just ahead of , which Reed and others charge put U.S. servicemembers at risk.
The White House said on Monday that it had of how Goldberg was inadvertently included on the group chat, and said that none of the information shared was classified, despite its sensitive nature.
"This case has been closed here at the White House as far as we are concerned," press secretary Karoline Leavitt told reporters. "There have been steps made to ensure that something like that can obviously never happen again, and we're moving forward," she added, without detailing those steps.
NPR disclosure: Katherine Maher, the CEO of NPR, chairs the board of the Signal Foundation.
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