military. the russians have run into the sand effectively being held back in a number of locations, even in mariupol, which they fully surrounded in the southeast of the country. still being held back there by ukrainian forces. the more they've held back and more they've struck out towards civilians, we've seen that graphically in kharkiv and in kyiv, the capital. kate? >> sam, thank you so much. let's go to kyiv right now, just as sam was talking about, where russian forces are approaching the city from all directions. the uk said russia could be preparing for a fresh attack against the capital in the coming days and the 40 mile long russian convoy outside of the city has largely dispersed and been redeployed. cnn's matthew chance, he's live in kyiv for us at this hour. matthew, what's happening on the ground there? >> reporter: kate, thanks very much. you're right about that convoy. it's moved into more defensive positions, taking cover underneath trees and sort of broken up a little bit because it had become a major target.