Two people were killed in the southern city of Mykolaiv, according to the regional governor, while another died in Zaporizhzhia in an attack that Ukraine's state emergency services agency said injured at least nine others.

"Unfortunately, two people were killed," Mykolaiv Governor Vitaly Kim said early Monday on Telegram, adding that a 45-year-old woman was wounded and hospitalised.

About 300 kilometres (185 miles) to the east in Zaporizhzhia, state emergency services said Russia carried out three air strikes that killed a man and damaged multiple buildings.

"Among the injured are a 15-year-old girl and two boys, 4 and 17 years old," the agency said on Telegram.

Overnight Saturday into Sunday, Russia fired 145 drones at Ukraine, according to Ukrainian President Volodymyr Zelensky, more than during any previous single nighttime attack during the conflict.

Russia also said it had downed 34 Ukrainian attack drones targeting Moscow on Sunday, the largest attempted attack on the capital since the start of the war in 2022.