Russia says it has destroyed dozens of missiles and drones fired at its territory from Ukraine. Local officials reported four people, including three children, were killed in attacks.
The Russian defence ministry said 13 missiles and 32 drones were shot down over several Russian regions.
A child was reported killed in Bryansk, while a man and two children in Belgorod are also said to have died.
The attacks follow strikes on Ukraine which killed 39 people.
Nearly 160 people were injured as Russia attacked with missiles and drones across the country on Friday – including the capital Kyiv, Odesa, Dnipro, Kharkiv and Lviv.
In an update on Saturday, Ukraine’s President Volodymyr Zelensky said nearly 120 villages and cities were attacked, including hundreds of “civilian objects” damaged.
Mayor of Kyiv Vitali Klitchsko said seven more bodies had been pulled from the rubble of a warehouse that had been hit – taking the total number of killed in the city to 16.
He described Friday’s attacks as the deadliest for civilians in the capital, declaring a day of mourning would be held in Kyiv on Monday.
An initial statement from the Russian defence ministry on Saturday said 13 missiles were destroyed over Belgorod overnight. Later, it said 32 drones had been shot down overnight in the Bryansk, Oryol, Kursk and Moscow regions.
The governor of Bryansk region, Alexander Bogomaz, said two villages were targeted and a child, born in 2014, had been killed.
A man was killed in Belgorod after a house was hit, regional Governor Vyacheslav Gladkov said. He added that four people were being treated for injuries and the water supply in the city of Belgorod was disrupted.
He said the attacks had damaged 55 homes, two private businesses, a football ground, a leisure centre and a pre-school.
In a later update, Mr Gladkov said new strikes on Belgorod city centre on Saturday afternoon had killed two children and injured an unspecified number of people.
Ukrainian media is reporting that more than 70 drones were used in Friday’s strikes and only military targets were attacked, according to sources from Ukraine’s intelligence services.
The reports say explosions were heard in regions including Moscow, Belgorod, Tula and Tver, while in Bryansk a group of drones successfully hit a electronic factory used to make Russian military equipment like long-range missiles and anti-aircraft systems. (BBC)