"unnecessary and escalatory." this as u.s. and european allies seek so further punish russia for its invasion of ukraine that includes tough new financial sanctions and new flight bans. still russian forces are pushing deeper into ukraine. resistance has reportedly been fierce. and in some placing the fighting street to street. but russia forces are advancing, these new satellite images you see show columns of military equipment 40 miles outside the capitol kyiv, and closing in. today ukraine's president volodymyr zelensky agreed to negotiations with russian officials without preconditions. as the fighting rages the unit nation reports nearly 400,000 people have fled the country. most of them women and children. we begin tonight on the ground in ukraine with cbs' holly williams. >> reporter: in just a few short days ukraine has transformed into a war zone. one russian missile hit an oil depot on the outskirts of the capitol kyiv early this morning. according to ukrainian officials. and in kharkiv just 20 miles