U.S. Strikes Yemen Rebels

US forces said they destroyed an underwater drone and nearly 20 ballistic missiles in a series of strikes against Yemen's Houthi rebels, who threatened to step up their attacks in the Red Sea during Ramadan.

The US Central Command (CENTCOM) said in a statement that the strikes were carried out after the Houthis fired two missiles towards a Singaporean-owned, Liberian-flagged merchant ship called the Pinocchio.

"The missiles did not impact the vessel and there were no injuries or damage reported," CENTCOM said.

Hours later, it added, US forces "conducted six self-defense strikes destroying an unmanned underwater vessel and 18 anti-ship missiles in Houthi controlled areas of Yemen".

The Houthis claimed responsibility for the attack on the Pinocchio in a statement, maintaining the missile strike "was accurate".

The British maritime security agency UKMTO had previously said a ship in the area "reported a sound of an explosion" in its vicinity southwest of the Yemeni port of Salif, and that US-led coalition forces were investigating.

The Houthi statement went on to say that "military operations will be escalated... during the month of Ramadan".

The attacks would be in support of the oppressed Palestinian people and those in the Gaza Strip, the Houthis military spokesman Yahya Saree said.

"The Yemeni armed forces confirm that they will continue to prevent Israeli navigation or those heading to the ports of occupied Palestine in the Red Sea and Arabian Sea until the aggression stops and the siege on the Palestinian people in the Gaza Strip is lifted," he added.

The attacks have sent insurance costs spiraling for vessels plying the key trade route and prompted many shipping firms to take the far longer passage around the southern tip of Africa instead.

Since January, the United States and Britain have launched repeated strikes on Houthi targets in Yemen in response to the attacks.