US Defence Secretary Pete Hegseth shared information about US air strikes on Yemen in a second private group on the Signal app, the BBC’s US partner CBS has confirmed with sources familiar with the messages.

The messages, sent on 15 March, included flight schedules for American F/A-18 Hornets carrying out strikes on Houthi targets. The group included Hegseth’s wife, brother and personal lawyer.

The developments come a week after the existence of another group on the same messaging app was revealed. It discussed sensitive information about military operations.