reporter: russian forces have started the battle for donbas, for which they have been preparing for a long time, and a considerable amount of the russian forces are concentrated and focused on that offensive. no matter how many russian servicemen they are bringing into that area, we will keep on fighting and defending and we will approximbe doing this dail and there are new images from mariupol. ekes of heavy fighting have decimate d the port city. the russians, now in near-toll control. a sprawling steel factory on the azov sea. a ukrainian commander in the city says hundreds of civilians have been sheltering there, as well. he says russian forces are aware of their presence and they are firing on the plant, anyway. translator: right now in mariupol, at the azov factory, hundreds of civilians are sheltering. among them are children of all