ISTANBUL, Oct 29 (Reuters) - Russia said on Saturday it was pulling out of a deal aimed at unlocking Ukrainian grain and fertiliser exports from Black Sea ports and easing global food shortages. TIME FRAMEThe deal signed on July 22 was valid for 120 days and the United Nations expected it to be renewed unless the war had ended by then. Under the deal, Ukrainian pilots guide the ships along safe channels in its territorial waters, with a minesweeper vessel on hand but no military escorts. Monitored by the JCC, the ships then transit the Black Sea to Turkey's Bosphorus strait and off to world markets. He added the deal had been successful in bringing food prices down and boosting export quantities.

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