Rescuers pulled three more crew members and a security guard alive from the Red Sea on Thursday, maritime security sources said, a day after Houthi militants sank the Greek ship Eternity C and said they were holding some of the crew still missing.

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.