KYIV (Reuters) -Ukrainian troops may need to pull back from the key frontline city of Lysychansk to avoid being encircled after Russian forces captured two villages to its south, regional governor Serhiy Gaidai said on Thursday. The retreat of Ukrainian troops from Lysychansk and Sievierodonetsk, the last two Ukrainian-held cities in Luhansk, would bring Moscow closer to one of its key war aims of capturing all of that region. Divided by a river, the cities have become a key battleground in Russia’s assault on the industrial heartland of Donbas and the fighting is nearing a “fierce climax,” a …
