Ukraine said on Monday that it had repelled a major Russian drone attack on the Black Sea region of Odessa overnight.
The air defence of the southern Ukrainian region shot down nine drones, military governor Oleh Kiper wrote on Telegram.
In the harbour area, falling debris damaged the roof of a building and caused a fire, which has since been extinguished, Kiper wrote.
At first, there was no information about possible victims.
A total of 14 drones and one missile were repelled throughout the country, according to the Ukrainian military.
Ukraine has been defending itself against a full-scale Russian invasion for 20 months.
The port city of Odessa, which played an important role in the export of Ukrainian grain, has repeatedly been the target of Russian attacks in the past.