responding to russia's worsening aggression and their war tactics. we'll have a report with the latest on his agenda in a couple minutes. we want to begin with new information out of mariupol. city council officials reporting hundreds of elderly refugees, women, children, are trapped under the rubble after russian forces bombed an art school that had been converted into a shelter. nbc's ali arouzi is in lviv reporting on this. good to talk to you once again. president zelenskyy has now accused russia of war crimes. what are we knowing, what are we learning about this latest attack? >> that's right, yasmin. he's accused them of war crimes, he's accused them of deliberately targeting civilians. last week, he said his heart is broken by what the russians are doing to mariupol, and it is a desperate situation there, as every day passes it seems to get worse and worse. so the latest news, as you mentioned, out of mariupol is that the russians bombed an art