U.S. airstrikes on Yemen’s capital Sana’a over the past day have killed at least 12 people and wounded 30 others, according to reports by Houthi media. A separate series of U.S. attacks Saturday on Yemen targeted Hodeidah’s port and airport. This comes as the death toll rose to at least 80 from a major U.S. military assault on the Ras Isa port on Thursday. The deaths included at least five humanitarian workers.

The U.S. has been continuously bombing Yemen since mid-March, after Houthi fighters vowed to resume targeting Red Sea ships tied to Israel’s war on Gaza. U.N. Secretary-General António Guterres warned of the growing risk of regional escalation and called for “utmost restraint.”