A Russian drone strike has hit Ukrainian port facilities at Izmail on the River Danube, a short distance from Nato member state Romania.
A grain warehouse and an elevator for loading grain were damaged.
Almost 40,000 tonnes of grain destined for African countries, China and Israel were damaged according to Ukraine.
Russia began targeting Ukraine’s ports after abandoning a UN deal that enabled safe grain export between both countries across the Black Sea.
Romanian President Klaus Iohannis condemned Russia’s continued attacks on Ukrainian infrastructure “in the proximity of Romania” as unacceptable.
Odesa regional leader Oleh Kiper said emergency services were working on the site of the latest Russian attack and there were no reports of any casualties.
Officials said the Izmail district prosecutor had launched an investigation into a cargo terminal, a warehouse and an elevator that were all damaged, without detailing exactly where in the Odesa region.
Ukraine is one of the world’s major exporters of wheat and corn.