The Pentagon’s watchdog ruled defence secretary Pete Hegseth put American troops at risk and violated department policy when he shared plans for strikes against Houthi rebels in Signal chats in March.
The defence department’s inspector-general concluded in a classified report to Congress that if foreign adversaries intercepted the information sent on the commercial messaging app, it could have endangered US service members and the mission itself, said a person who has seen the report.
The report comes as Hegseth has been embroiled in a furore over the legality of a lethal double strike on an alleged drug-trafficking boat in the Caribbean in September, as the US weighs further military action in the region, including on Venezuelan soil.