THE UKRAINIAN grain exports deal, which could collapse within weeks, is critical for millions of people in the Horn of Africa, where some are already starving, the UN said yesterday. The Black Sea Grain Initiative aimed at easing the global food crisis is set to expire at the end of July 17 unless Russia agrees to its renewal -- while Moscow remains unhappy about the operation of a parallel agreement. If the export deal collapses, it would “absolutely hit eastern Africa very, very hard,” said Dominique Ferretti, the UN World Food Programme’s senior emergency officer in the region. “There’s a number of countries that depend on Ukraine’s wheat. And with- out it, you would see significantly higher food prices,” he told reporters via video-link from Nairobi. Russia’s full-scale invasion of…