Explosions were reported in both Odesa and the port city of Izmail, Odesa Oblast, during an air raid alert, Suspilne national broadcaster reported in the early hours of Sept. 27.
Izmail is a strategic port city along the Danube River, which serves as a vital hub for Ukrainian grain exports.
Ukraine's Air Force earlier reported Russian attack drones spotted in the Oblast's South.
Details on damage or casualties from these attacks have yet to be confirmed.