Kyiv (Ukraine) (AFP) – Russian and Ukrainian officials were to hold talks in Istanbul on Wednesday over stalled grain deliveries that have pushed global food prices skywards, while Kyiv said it had destroyed a Russian arms depot as the war rages on. Ukraine is one of the world’s biggest exporters of wheat and other grain, but shipments have been blocked by both Russian warships and mines that Kyiv has laid across the Black Sea. Turkey, which has spearheaded efforts to resume the essential grain trade, will host the talks, which will also be attended by a UN delegation. On the ground, Kyiv said…