Britain ac­cused Iran on Thurs­day of hold­ing the world’s econ­o­my hostage as diplo­mats from more than 40 coun­tries held talks on ways to press Tehran to re­open the Strait of Hor­muz, a vi­tal oil route that has been choked off by the U.S.-Is­raeli war against Iran.

The U.S. didn’t at­tend the vir­tu­al meet­ing, which came af­ter U.S. Pres­i­dent Don­ald Trump made clear that he thinks se­cur­ing the wa­ter­way is not Amer­i­ca’s job. Trump has al­so dis­par­aged Amer­i­ca’s Eu­ro­pean al­lies for fail­ing to sup­port the war and re­newed his threats to pull the U.S. out of NA­TO.

U.K. For­eign Sec­re­tary Yvette Coop­er said the talks, which fo­cused on po­lit­i­cal and diplo­mat­ic rather than mil­i­tary means, showed “the strength of our in­ter­na­tion­al de­ter­mi­na­tion” to re­open the strait. The 41 coun­tries rep­re­sent­ed came from all con­ti­nents ex­cept Antarc­ti­ca, a re­flec­tion of the glob­al tremors from a war that has sparked short­ages of fu­el and fer­til­iz­er and high­er prices for food far be­yond the Mid­dle East.