Yemen's Houthis said on Tuesday they would expand their range of targets in Israel in the next hours and days unless the "aggression" on Gaza stops. The Iran-aligned group's military spokesperson Yahya Sarea also confirmed that they had targeted an air base in Israel with a ballistic missile.

The United States and Iran-backed Houthi rebels in Yemen are both vowing escalation after the U.S. launched airstrikes to deter the rebels from attacking military and commercial vessels on one of the world's busiest shipping corridors.

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

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.