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Russia and Ukraine resumed peace negotiations after three days.
Ukraine has retaken some cities near the capital, Kiiu, and it has also been claimed that airstrikes have also been carried out on the Russian mainland.
Russia is responding with indiscriminate bombing.
Correspondent Koh Ji-hyun.
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Russia and Ukraine both announced that videoconferences for peace negotiations have begun.
It has been three days since the face-to-face negotiations in Turkey, where discussions on Ukraine's neutrality status were active.
But even before the start, the Russian Kremlin has claimed that a Ukrainian helicopter attacked an oil storage tank in western Russia's Belgorod province, warning that it could "be a stumbling block to negotiations."
Ukraine did neither affirm nor deny at first, but
[Olexi Arestovich / Ukrainian Defense Ministry spokesperson: This is not the first time such a statement has been made.
I will not confirm or deny this information.]
Since then, it has been stated that it is not true at all, and some have even claimed that it is a Russian work of art.
Ukraine launched a massive counterattack, pushing Russian troops north of the capital Kiiu.
Ukraine's General Staff said it had recaptured Ivankiu, following the cities of Irfin and Bucha on the outskirts of Kiiu.
Even in the second city of Kharkiv, Ukraine blocked the entry of Russian ground forces.
Russia, pushed back from the front line, responded with large-scale bombing.
Following Kiiu and Kharkiv, missiles were also poured into grain warehouses in the eastern granary.
The International Atomic Energy Agency has announced that inspectors will soon go to Chernobyl, where the Russian military has withdrawn.