In the major Black Sea export port of Odesa, drones hit residential buildings, a school and a kindergarten, Serhiy Lysak, the head of the local military administration, said on messaging app Telegram.

An 11-year-old boy and a 59-year-old man were injured in the attack, he added.

Russia hit the southeastern Ukrainian city of Dnipro with missiles in a separate attack, injuring nine people, including a 10-year old boy, regional governor Oleksandr Hanzha said on Telegram.

In Russia, drones were downed overnight in the southern region of Rostov, including the port city of Taganrog on the Sea of Azov, regional governor Yuri Slyusar said on Telegram.

At least four died, three of them in the Moscow region, after Ukraine launched its biggest overnight drone attack on the Russian capital in more than a year, officials said on Sunday.

Reuters could not independently verify battlefield reports. Both sides ​deny deliberately targeting civilians.