Two ships traveling in Middle East waters were attacked by suspected Yemen Houthi rebel drones early on Tuesday, authorities said, the latest assaults in the Iranian-backed fighters’ campaign of targeting vessels over Israel’s war on Hamas in the Gaza Strip.

The first attack happened in the southern part of the Red Sea, west of the Yemeni port of Hodeida, with the projectile causing “slight damage” to the vessel’s windows on the bridge, the British military’s United Kingdom Maritime Trade Operations said. A small vessel had been nearby the ship before the attack, it added.

The private security firm Ambrey identified the vessel as a Barbados-flagged, United Kingdom-owned cargo ship. No one was hurt onboard the vessel, which suffered “minor damage,” the firm said.

A second ship came under attack later Tuesday off Yemen’s southern port city of Aden, the UKMTO reported. Ambrey identified it as a Marshall Islands-flagged, Greek-owned vessel coming from the U.S. heading to India.

“The vessel reported an explosion 50 meters off its starboard side,” Ambrey said. “No injuries or damage were reported.”

Later, a military spokesman of the Iranian-backed Houthi rebels, Brig. Gen. Yahya Saree, claimed in a statement that the rebel forces attacked two separate vessels, one American and one British, in the Red Sea. He provided no evidence to support the claim.

The Houthis made no claim about the attack off the coast of Aden.

One of the ships the Houthis claimed they attacked — the Morning Tide — matched details provided by Ambrey. Tracking data showed it to be in the Red Sea near the reported attack.

The Morning Tide’s owner, British firm Furadino Shipping, told The Associated Press no one was hurt in the attack and the ship was continuing onward to Singapore.

Since November, the rebels have repeatedly targeted ships in the Red Sea over Israel’s offensive in Gaza against Hamas. But they have frequently targeted vessels with tenuous or no clear links to Israel, imperiling shipping in a key route for trade among Asia, the Mideast and Europe.

In recent weeks, the United States and the United Kingdom, backed by other allies, have launched airstrikes targeting Houthi missile arsenals and launch sites for its attacks.

The U.S. and Britain struck 36 Houthi targets in Yemen on Saturday. An air assault Friday in Iraq and Syria targeted other Iranian-backed militias and the Iranian Revolutionary Guard in retaliation for a drone strike that killed three U.S. troops in Jordan.

The U.S. military’s Central Command separately acknowledged an attack Monday on the Houthis, in which they attacked what they described as two Houthi drone boats loaded with explosives.

American forces “determined they presented an imminent threat to U.S. Navy ships and merchant vessels in the region,” the military said. “These actions will protect freedom of navigation and make international waters safer and more secure for U.S. Navy vessels and merchant vessels.”

(AP)