Senior Trump administration officials have been accused of using the third-party app to discuss highly sensitive national security information.
The Pentagon inspector general's office said it would evaluate Hegseth's use of Signal to discuss strikes against the Houthis.
The acting Inspector General of the Defense Department will review Secretary of Defense Pete Hegseth’s use of Signal in a group chat with other key national security officials to discuss military strikes against the Houthis in Yemen last month,
The evaluation will look into whether Defense Secretary Pete Hegseth complied with department policies when using a Signal group chat last month.
The inspector general review follows revelations that top Trump officials used the unclassified platform Signal to coordinate military strikes in Yemen.
The acting inspector general for the Department of Defense announced Thursday that he is investigating Secretary of Defense Pete Hegseth's use of a "commercially available messaging application for official business.
The Pentagon's inspector general launched a probe into the Trump administration's use of Signal to discuss a planned strike on the Houthis in Yemen.