After Yemen’s Houthi rebels attacked a Liberian-flagged cargo ship, resulting in its sinking in the Red Sea, four people are presumed dead while 15 others are still unaccounted for, according to a European Union naval mission’s statement on Friday.

On Monday, the Iran-backed Houthi rebels attacked the Liberian-flagged bulk carrier Eternity C in the Red Sea off the port city of Hodeida for two days before sinking it. It was the second such attack on maritime shipping in the vital waterway in as many days after months of hiatus,