Russia hits center square of Ukraine's second-largest city, 40-mile convoy outside capital Kyiv

Russia on Tuesday took direct aim at Ukraine's second-largest city, pounding Kharkiv's center square and reportedly other civilian targets. 

The attack marks the sixth day of the Russia invasion of Ukraine amid reports of a 40-mile convoy of Russian tanks and other vehicles threaten the capital of Kyiv.

Ukraine President Volodymyr Zelenskyy is now accusing Russian President Vladimir Putin of resorting to terror tactics in what has become Europe’s largest ground war in generations, according to the Associated Press.

The collective population in Kharkiv and Kyiv is roughly 4.2 million people. A reported 500,000 Ukraine residents have so far fled the country. At least 100 civilians in Ukraine have been killed in the Russian invasion with the Ukraine military and residents trying to beat back the attacks. 

In Kharkiv, a strategic eastern city with a population of about 1.5 million, at least six people were killed when an administrative building was attacked, and a maternity ward was relocated to an underground shelter, the wire service also reports.