Russian kamikaze drones hit 52 Ukrainian targets, according to the Ukrainian Air Force.
Officials reported that more than 40 drones were shot down in Kyiv alone.
This information has not been verified independently.
Since February 2022, Russia has intensified its bombardment on Kyiv to break its defences.
Twelve regions of Ukraine, from Volyn in the northwest to Dnipropetrovsk in the southeast, were placed on air raid alert earlier on Sunday.
He said that drone fragments ignited at least two high-rise structures in different capital districts.
In addition, Kyiv officials reported that warehouses in the Holosiyivsky district in the city’s south were smoldering.
As residents prepared to celebrate Kyiv Day – the anniversary of the city’s foundation 1500 years ago and a popular holiday before the conflict – some officials accused Russia of deliberately targeting Kyiv.
There were also reports of detonation in the western Ukrainian city of Zhytomyr.
Later, the air alert was withdrawn in the nation’s capital and throughout the country.
The assaults precede a widely anticipated Ukrainian counteroffensive.
Saturday, one of the highest-ranking security officials in Ukraine told that the country was prepared to initiate such an operation.
Oleksiy Danilov, secretary of the powerful National Security and Defence Council of Ukraine, stated that an assault to retake territory from President Vladimir Putin’s occupying forces could commence “tomorrow, the day after tomorrow, or within a week”.
Warnant that arms shipments to Ukraine could escalate the conflict to unprecedented levels, he added, “Sooner or later, this escalation may take on a new dimension that we do not need and do not want.”