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Iran­ian-backed Houthi rebels en­tered the month-old war in the Mid­dle East on Sat­ur­day by claim­ing a mis­sile launch that Is­rael said it in­ter­cept­ed. Pak­istan said re­gion­al pow­ers plan to meet Sun­day on how to end the war, while Iran ex­pressed scep­ti­cism about the diplo­mat­ic ef­forts.

The war has threat­ened glob­al sup­plies of oil, nat­ur­al gas and fer­til­iz­er and dis­rupt­ed air trav­el. Iran’s grip on the strate­gic Strait of Hor­muz has shak­en mar­kets and prices. The Unit­ed States and Is­rael con­tin­ue to strike Iran, whose re­tal­ia­to­ry at­tacks have tar­get­ed Is­rael and neigh­bor­ing Gulf Arab states.

The Houthis’ en­try could fur­ther hurt glob­al ship­ping if they again tar­get ves­sels in the Bab el-Man­deb Strait off the Red Sea, through which about 12% of the world’s trade typ­i­cal­ly pass­es.