Kyiv urged Warsaw on Monday to "hold to account" Polish farmers for stopping three trucks at a border crossing between Poland and Ukraine and spilling the Ukrainian grain they were carrying.

Polish agriculture minister apologizes for "act of desperation"
Three EU countries have restricted Ukraine grain imports
Ukraine sues three EU member states at WTO
European Commission decides not to extend ban
PM says EU offer a 'drop in the ocean'
Ukraine also trying to salvage Black Sea grain deal
Poland, Hungary ban imports; Slovakia follows
CBOT wheat, corn retreat
January soybeans also close higher