The insurance cost of shipping goods through the Red Sea has more than doubled in recent days after Yemen's Houthis attacked and sank two ships, killing at least four seafarers after months of calm, industry sources said on Thursday.

In just days, Yemen’s Houthi rebels have begun a new, more violent campaign of attacks targeting ships in the Red Sea, sinking two of them and killing some of their crew.

Rescuers searched Thursday for more than a dozen crew members who went missing after Yemen's Houthi rebels sank a ship in the Red Sea as the United States alleged the group may “have kidnapped” those ...