In a memorandum addressed to US Defense Secretary Pete Hegseth, the Inspector General's office said it would examine whether the use of Signal met Defense Department guidelines.

Anna Commander is a Newsweek Editor and writer based in Florida. Her focus is reporting on crime, weather and breaking news. She has covered weather, and major breaking news events in South Florida.

In the group chat, an account labeled “Pete Hegseth” relayed ... collided with a passenger jet in Washington, D.C., killing 67 people, Hegseth and Trump answered questions from reporters ...

Pete Hegseth ... member of the Armed Services Committee, have formally requested an investigation by the Pentagon's inspector general into both the leak and Hegseth's handling of classified ...

Pentagon's watchdog delves into a high-stakes investigation into Pete Hegseth's use of the Signal app after a US security breach ...