The revelation came as The Atlantic magazine exposed posts from US defence secretary Pete Hegseth giving precise military details, including timings, of the March 15 attacks against Yemen's Houthis.
Yet when quizzed by The Atlantic on Monday about the security breach, he said: "Nobody was texting war plans. And that's all I have to say about that."
President Donald Trump's senior cabinet have struggled to explain how apparently classified details were on an unclassified Signal chat, to which employing the 'linked devices' feature to spy on encrypted conversations."
The memo warns staff not to send "anything compromising over any social media or internet-based tool application". One Western intelligence source said: "This is basic, schooldays stuff that all intelligence or military peo...