(ANSA-AFP) - KYIV, SEP 4 - Russia carried out a "massive" drone attack targeting Ukraine's Odesa region, Ukrainian officials said Monday, damaging a grain export hub on the Danube river. The strikes came hours before a summit in Russia between President Vladimir Putin and Turkish leader Recep Tayyip Erdogan, who hopes to revive a grain deal Moscow exited in July aiming to safeguard Ukraine's Black Sea exports. "Seventeen drones were shot down by our air defence forces," regional governor Oleg Kiper wrote on Telegram, adding there were no civilian casualties. "But, unfortunately, there are also hits," he said. "In several settlements of Izmail district, warehouses and production buildings, agricultural machinery and equipment of industrial enterprises were damaged." The Danube river port of Izmail, which borders NATO member Romania, has become a main export route for Ukrainian products following Russia's withdrawal from the UN-brokered grain deal. Ukraine's military said Russia had used Iranian-made Shahed drones in the "massive" overnight attack, which "was directed at the civil infrastructure of the area of the Danube". (ANSA-AFP).