want to leave? >> reporter: there are still efforts and they're halting. there are efforts to try to get buses to transport people out and those have been stopped on various days. the ukrainian government accusing the russian military of kidnapping the emergency workers who were trying to take those buses to mariupol. meanwhile the defenders inside, they are facing a very dire situation. they are surrounded by far more russian troops than they have, they concede that, but they say they are going to fight. take a listen. >> it's urban combat. so yeah, that's street-to-street, building-to-building. they are trying to block us in the city blocks. we are pushing them back. the enemies -- the enemy have very, very serious casualties. basically we're not counting