five dozen civilians have been killed in the fighting and cnn has now learned a 6-year-old boy is among the dead. now, this is the scene in kyiv overnight. cnn cameras comapturing the momt an explosion lit the sky above ukraine's capital. one of two massive explosions on the city's outskirts. let's take a closer view now. this area, just southeast of kyiv, is home to a large military airfield. the town's mayor says is petroleum storage depot was hit adding, quote, the enemy wants to destroy everything but we will stand our ground and we will win. char words of defiance from ukrainian president volodymyr zelenskyy, who has, so far, refused u.s.' offers to evacuate him. >> translator: the world has seen that ukrainians are powerful. ukrainians are courageous. they are on their native land and they are never going to give up to anyone. they will never betray it.