Ukrainian forces say they struck a Russian ammunition depot in the eastern part of the country on Sunday, as clashes intensified in the region.
"Ukrainian defenders continue to deter the aggressor in the area of responsibility of the Operational and Tactical Group East," the statement read.
"Today, on May 29, our artillery fired at the personnel and equipment of the Russian fascist troops.".
The Donbas region has been the focus of Russia's war against the country in recent weeks, after forces withdrew from Kyiv.
If Putin's troops capture the two twin cities of Severodonetsk and Lysychansk, then all of Luhansk would be under Russian control.
"Capturing Severodonetsk is a principal task for the occupation force," Zelensky said, adding that Russian troops don't care about casualties.
Zelensky has repeatedly asserted that Ukraine will never give up territory to help reach peace in the ongoing conflict. »