Greece's Cosmoship Management on Thursday said one person is believed dead and four more have not been seen since Houthi militants attacked and sank the Eternity C cargo ship in the Red Sea this week.

Four people are presumed dead after a Liberian-flagged cargo ship came under an hourslong attack from Yemen's Houthi rebels, who ultimately sank the vessel in the Red Sea.

A fresh and deadly wave of Houthi maritime attacks has shattered a months-long period of relative calm in the Red Sea, with the Liberian-flagged, Greek-operated bulk carrier Eternity C (IMO 9588249) becoming the latest casualty.