we get more now from cnn's kristen fisher. >> reporter: the ukrainian resistance is not letting up, but neither is the russian offensive as russian bombardments cause even more havoc in ukrainian cities, this residential building in the capital, kyiv, was hit by the debris of a downed missile. ukraine's emergency service says at least one person was killed. but incredibly, in the besieged city of mariupol, signs of survivors. just one day earlier, an air strike hit a theater where civilians were sheltering. despite the russian word for "children" written on the ground outside the building. today the ukrainian parliament commissioner for human rights says survivors have begun to emerge from the wreckage. there had been more than a thousand people sheltering, believed to be inside. this video last week shows the cramped conditions inside as the city has been cut off from water, power, and heat. >> still, in spite of that, this monster has bombed the theater. >> reporter: russia denies attacking the theater, accusing ukrainian militants of killing their own people. in the southern city of