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.

Six crew members have been rescued and at least three others killed after a cargo ship was attacked by Yemen's Houthis and sank in the Red Sea, a European naval mission says.

Rescuers launched a search Wednesday for survivors of a Liberian-flagged cargo ship that came under attack from Yemen's Houthi rebels in the Red Sea, authorities said.