Despite weeks of talks, United Nations mediators have failed to get Russia and Ukraine to agree on a set of measures that would allow the Black Sea Grain Initiative (BSGI) to continue beyond its next expiration date of 18 July.
The impasse is already hampering key agricultural exports from the region.
Kyiv refuses to allow Russian ammonia through a pipeline on Ukrainian territory, depriving world markets of a key element to produce fertiliser.
