Top shipping insurers have told brokers that they will not sell war cargo insurance to Saudi Arabia-linked ships in the Red Sea, following attacks by Yemen’s Houthi rebels, in a further risk to oil exports from the region.

Several of the leading marine war insurers at Lloyd’s of London market said on Friday that they would exclude vessels with any “Saudi touchpoints” from coverage, two brokers said, including ships travelling under other flags that have made past calls at Saudi ports.