President Volodymyr Zelenskiy said Ukrainian forces carried out overnight strikes against targets in Russia, including an oil refinery in Yaroslavl and a military airfield in the Rostov region.
Peace efforts to end Russia's four-and-a-half-year full-scale invasion have stalled, with the issue of territorial concessions in eastern Ukraine among the central sticking points.
Successive rounds of US-brokered talks have failed to produce a breakthrough.
Ukraine is also seeking security guarantees from partners for a deal.
The Kyiv City Military Administration said the attacks were recorded at more than 10 locations in the city while 33 sites were damaged in the wider region.
A 10-year-old girl and a 12-year-old boy were among the injured, the administration said in a statement on Telegram on Thursday.
Ukraine's air force said it destroyed or suppressed 131 Russian aerial targets during the overnight attack in the Kyiv, Zaporizhzhia and Odesa regions.
The attack involved ballistic and cruise missiles as well as drones and decoys.
Russia's defence ministry said the military hit metallurgical and electronics plants, factories of the military-industrial complex and energy and transport facilities.
It said three bulk carriers and a ferry carrying supplies for the Ukrainian military were hit in the port of Chornomorsk.
Zelenskiy said the operation against the Yaroslavl Oil Refinery was conducted jointly by Ukraine's Security Service, special operations forces, military intelligence and the Foreign Intelligence Service.
He said wrote on Telegram that the security service struck a military airfield in Rostov, damaging an An-12 aircraft, two An-26s and three helicopters.
In Odesa, seven people were injured, including two children, according to Ukraine's State Emergency Service.
Apartments on the 14th through 16th floors of a residential building were damaged.
A private residential building in Odesa was also destroyed and others damaged.
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