Russian forces launched a "massive" drone attack on southern Ukraine overnight, scrambling air defenses across the region, a Ukrainian military spokesperson said Thursday.

Speaking on Ukrainian television, Natalia Humeniuk, spokesperson for Operational Command South, said air defenses destroyed more than 30 drones but the impact of the attack remained unclear.

"The operational situation [in the south] is quite tense," she said. "Air defense systems were operating along the entire southern direction — in Odesa and Mykolaiv regions, and much higher up in the central regions."

Earlier Thursday, a Ukrainian military official said no casualties or damage were reported after Russia launched a drone attack on the southern Odesa region overnight.