Ten people have been rescued from the Red Sea after their ship sank near Yemen following an attack by the Houthis, according to the European Union’s maritime security mission, with several others believed to be being held by the rebel group.

At least four people have been killed and several others have been kidnapped by Houthi militants who attacked and sank a second cargo ship in the Red Sea this week.Six crew members were rescued after spending more than 24 hours in the water,

Washington and the Houthis agreed to a deal on May 6 that ended a US bombing campaign against the group, in exchange for the rebels stopping attacks on US vessels in the Red Sea. However, the Houthis said that the deal did not stop them from attacking Israeli-linked shipping.