The U.S. launched airstrikes on multiple targets across Yemen overnight, including Saada province, which Yemeni sources say is a long-time hideout for Houthi leaders, and the Red Sea port city of Hodeidah,

Yemen's Houthi rebels say there have been fresh US strikes against them, with the number of dead rising to 53, including five children. Targets in the Al Jaouf and Hudaydah areas were hit early on Monday, according to the rebel group, while the US Central Command said its forces had continued operations.

The Iranian-backed rebels, who have targeted Israel and shipping in the Red Sea, said children were among those killed in the strikes ordered by President Trump.