U.S. Defense Secretary Pete Hegseth shared details of a March attack on Yemen's Iran-aligned Houthis in a message group that included his wife, brother and personal lawyer, a source familiar with the matter said Sunday.

The revelations of a second Signal chat raise more questions about Hegseth's use of an unclassified messaging system to share highly sensitive security details and come at a particularly delicate moment for him, with senior officials ousted from the Pentagon last week as part of an internal leak investigation.

In the second chat, Hegseth shared details of the attack similar to those revealed last month by The Atlantic magazine after its editor-in-chief, Jeffrey Goldberg, was included in a separate chat on the Signal app by mistake, in an embarrassing incident involving all of President Donald Trump's most senior national security officials.