According to a report, US defense chief Hegseth shared information about the Yemen strike in a second Signal chat.

Defense Secretary Pete Hegseth shared information about a military action targeting Yemen’s Houthis in a private chat group on Signal, using his personal phone. This group, established during his confirmation, included his wife, his brother, and his lawyer, and continued to operate afterwards with more than a dozen participants.

Source: https://www.france24.com/en/americas/20250421-us-defense-chief-hegseth-yemen-attacks-isignal