(Bloomberg) -- A Russian missile strike on a residential area killed at least four people and injured dozens more in Lviv in far western Ukraine. It was the deadliest hit of the invasion on the city, about 50 kilometers (31 miles) from the Polish border and a key supply route and transportation hub. President Volodymyr Zelenskiy vowed a “strong” response. More than 1000 km to the east, Ukrainian forces continued offensive operations around Bakhmut, General Staff said. Most Read from BloombergNYC