Russian strikes on Odessa port cast doubt over grain deal

Russia also pursued an artillery campaign over Ukraine's second city, Kharkiv

Ukraine has mined and barricaded its Black Sea ports to avert a Russian amphibious assault

Ukrainian President Volodymyr Zelensky denounced a missile strike on the port of Odessa as "Russian barbarism" just a day after the warring sides struck a deal to resume cereal exports blocked by the conflict.

Odessa is one of three export hubs designated in the agreement and Ukrainian officials said grain was being stored in the port at the time of the strike, although the food stocks did not appear to have been hit.