Uncertainty looms over Black Sea grain deal extension between Ukraine and Russia.

Negotiators have 24 hours to save a grain deal between Ukraine and Russia that has enabled Ukraine to export millions of tons of grain and help ease a global food crisis despite the war it is fighting with Russia. The deal has been extended twice already, but Russia has threatened to pull out of the arrangement by May 18 unless a list of its demands are met. The United Nations' World Food Programme has said that Russia's invasion of Ukraine has contributed to "acute food insecurity" for over a quarter of a billion people globally.