landed, a strategic air base there. since that time, there is been a lot of to'ing and fro'ing. unclear who controls which part of which territory in those outskirts of the ukrainian capital. the latest information we've had within the past few minutes, the ukrainian security services say russian forces are holding about 40 civilians in a building in that region. holding they will as hostages, is what the ukrainian security forces are saying. so it is obviously a very fluid situation. and again, there seems to be some stand-off with civilians caught in the middle between the two warring sides, jake. >> and matthew, you've been trying to access subways and basements where many ukrainians have been living in shelters. have you been able to get in