Mike Waltz, national security advisor, resigns

(AFP) President Donald Trump's National Security Advisor Mike Waltz will resign his post following a scandal in which a journalist was accidentally included on a chat between officials about air strikes on Yemen, per various media reports.

Waltz and his deputy Alex Wong are both set to leave, CBS News reported, while Fox News said Trump was expected to comment on the matter soon. The White House did not immediately comment.

The former U.S. representative is first top official to leave the administration in Trump's second term

Waltz had been under pressure since The Atlantic's editor-in-chief revealed in March that he was mistakenly added to a chat on the messaging app Signal about attacks against Houthi rebels.

The chat laid out the attack plan, including the times when U.S. warplanes would take off to bomb targets in Yemen.