country and a very frightening reality. and there isn't a clear sense of what people here in the city of kharkiv, 1.4 million people, are supposed to do. are they supposed to evacuate? because this city is actually uniquely vulnerable. you have a huge build-up of russian forces just on the other side of the border. you heard our fred pleitgen who's been reporting from there hearing a sort of steady stream of outgoing artillery. and we know that troops have continued to mass along with heavy weaponry and armor. so the question is do we start to see some kind of a ground invasion? is this a sort of prelude to that as they go about softening military targets? an interior ministry adviser told cnn that they believe the strikes here that we've been hearing around kharkiv are military targets. we don't know exactly what they are yet. i assume we'll get a better sense now that the day is beginning. as to what the targets were.