"This is a small town - 4 km by 4 km (2.5 miles by 2.5 miles) - a cosy and very homely square- yet into the fourth month they cannot capture it," Luhansk Governor Serhiy Gaidai said on television.
Ukraine has begged Western countries for more heavy weaponry, including advanced rocket systems, to hold off Russia's offensive, now concentrated in the east after Russian forces failed to seize Kyiv following the Feb. 24 invasion.
The United States, European Union nations and Britain have all promised such weapons, but Ukraine says deliveries have been too slow.