Yemen's Houthis will not "dial down" their action against Israeli shipping in the Red Sea in response to U.S. military pressure or appeals from the group's allies such as Iran, the Yemeni militant group's foreign minister said.

U.S. President Donald Trump has explicitly linked the actions of Yemen’s Houthi rebels to the group’s main benefactor, Iran.

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.

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.