Yemen's Houthi rebels have declared a blockade on Saudi Arabia, potentially widening the Iran war and further disrupting global trade. They claim to have closed the Bab el-Mandeb Strait to Saudi-linked shipping in retaliation for a Saudi blockade on Yemen and a recent attack on the airport in Yemen's rebel-held capital.
The strait is a vital shipping chokepoint, with around 12% of global trade passing through. Houthi attacks on shipping would risk reigniting the war with Saudi Arabia, which has diverted millions of barrels of oil exports to the Red Sea as the Iran war has largely closed the Strait of Hormuz.