JERUSALEM (AP) — A Portuguese-flagged container ship came under attack by a drone in the far reaches of the Arabian Sea, corresponding with a claim by Yemen’s Houthi rebels that they assaulted the ship there, authorities said Tuesday.

The attack on the MSC Orion, occurring some 600 kilometers (375 miles) off the coast of Yemen, appeared to be the first confirmed deep-sea assault claimed by the Houthis since they began targeting ships in November. It suggests the Houthis — or potentially their main benefactor Iran — may have the ability to strike into the distances of the Indian Ocean as the rebels previously threatened in their ongoing campaign over Israel’s war on Hamas in the Gaza Strip.

The attack happened last Friday, according to the Joint Maritime Information Center, which operates as part of the U.S.-led Combined Maritime Forces in the Mideast. After the attack, the crew discovered debris apparently from a drone on board, the center said.