A four-year-old boy and his 35-year-old father have been killed in an overnight Russian air strike outside of Kyiv, Ukrainian officials say.
Three other people, including a teenage boy, were wounded in the attack just east of the capital, which President Volodymyr Zelenskiy said involved a North Korean-made missile.
He did not offer further detail but Ukrainian emergency services earlier said the victims' home in the Brovary district was struck by debris from a downed Russian missile.
Footage posted by Ukraine's State Emergency Service showed workers digging through a pile of debris in the darkness and lifting the body of a child from underneath it.
"According to preliminary information, the Russians used a North Korean missile in this attack - yet another deliberate terrorist strike against Ukraine," Zelenskiy wrote on X, adding that experts were still examining the weapon.
Moscow's overnight strike also included 57 Iranian-made attack drones that were launched across Ukraine, 53 of which were destroyed by air defences, Kyiv's air force said.
It said Russia had fired a total of four North Korean-made KN-23 missiles but did not specify the fate of the other three.
Reuters could not independently verify the reports.
Zelenskiy's top adviser had earlier said the Brovary fatalities were the result of a downed drone.
Zelenskiy, in his statement, called for "a full-fledged air shield" from Ukraine's partners and permission to strike deep inside Russia with Western-provided weapons.
There was no immediate comment from Russia.
Moscow denies targeting civilians but has targeted critical infrastructure beyond the front line of its 29-month-old invasion that has killed thousands and displaced millions of Ukrainians.
Zelenskiy acknowledged for the first time that Ukrainian forces were fighting in the surprise offensive in Russia's Kursk, as the border region's authorities rushed to evacuate civilians from areas at risk.
Moscow's forces are in their sixth day of intense battles against Kyiv's largest incursion into Russian territory since the start of the war, which left southwest parts of Russia vulnerable.
In a sign of the gravity of the situation, Moscow imposed a sweeping security regime in three border regions on Saturday, while ally Belarus sent more troops to its border with Ukraine, accusing Kyiv of violating its air space.
In his nightly video address, Zelenskiy said he had discussed the operation with top Ukrainian commander Oleksandr Syrskyi, vowing to restore justice after Russia launched a full-scale aggression on its smaller neighbour in February 2022.
"Today, I received several reports from commander-in-chief Syrskyi regarding the front lines and our actions to push the war onto the aggressor's territory," he said.
"Ukraine is proving that it can indeed restore justice and ensure the necessary pressure on the aggressor."
Russian President Vladimir Putin cast the Ukrainian attack - which military analysts say caught the Kremlin off-guard - as a major provocation.
Russia's top general, Valery Gerasimov, said on Wednesday the attacks had been halted, but Russia has failed to push the Ukrainian forces back over the border.
Russia says its air defence units destroyed 14 Ukraine-launched drones and four Tochka-U tactical ballistic missiles over the Kursk region
Sixteen drones were downed over the Voronezh region, several hundred kilometres south of Moscow, and three drones over the border Belgorod region, it said.
One drone each was destroyed over the Bryansk and Orlov regions, the ministry said on the Telegram messaging app.
