On Monday, U.S. Defense Secretary Pete Hegseth dismissed new allegations that he shared information about military strikes in Yemen through a Signal chat group that included his wife, brother, and personal lawyer.

The Pentagon's inspector general's office announced on Thursday that it will investigate Defense Secretary Pete Hegseth's use of the commercial messaging app Signal to discuss airstrikes on Yemen.

US President Donald Trump has dismissed concerns that officials inadvertently included a journalist in a group chat discussing war plans on the messaging platform Signal, saying there “was no classified information” shared in the group.

Senior Democrats have been highly critical of the way messages about US attacks on the Houthis were shared on Signal and that a journalist was added to the group.

The Atlantic on Wednesday published additional text messages from the Signal group chat of top Trump national security officials, underscoring a massive breach in operational security as specific sensitive information about the Houthi attack was shared in the chat before it was carried out.