One child is among the victims, while four people are in serious condition, Kiper said on the Telegram messaging app.
Meanwhile, 11 people, including two children, were killed on Sunday when a Russian missile hit a residential building in Ukraine's northeastern city of Sumy, Ukrainian officials said, while another missile strike left the region's administrative center without power.
Eighty-nine people, including 11 children, were also injured in the attack on Sumy, Ukraine's state emergency service said via the Telegram messaging app.
The attack on Sumy followed a morning of Russia pounding Ukraine's power grid in what Kyiv said was a "massive" attack with 120 missiles and 90 drones that killed at least seven people.
"Sunday evening for the city of Sumy became hell, a tragedy that Russia brought to our land," Volodymyr Artyukh, the head of the Sumy military administration, said in a post on the administration's Telegram messaging channel.
The military administration said another missile hit critical infrastructure, leaving the city without power.
Ukraine's air force said that Russian forces used two Iskander-M ballistic missiles and a Kh-59 guided missile in the overnight attack.
Rescuers and all necessary services continued to work at the scene and psychologists were providing assistance to those affected, the State Emergency Service of Ukraine said on Telegram.
More than 400 people were evacuated, the Service added.
Photographs posted on Telegram by the State Emergency Service of Ukraine showed firefighters battling a blaze consuming cars and rescuers carrying people out of a building. One image showed a multi-story building with nearly all windows blown out and its facade damaged.
Sumy regional prosecutors said the attack damaged 90 apartments, 28 cars, two educational institutions and 13 buildings.
Both sides in the war deny targeting civilians in their strikes on each other's territory. But thousands have died since early 2022 in Russia's full-scale invasion of Ukraine, the vast majority of them Ukrainians.
