but if they could show us some documents or something as that, but they didn't. >> translator: they want to destroyed ukraine by destroying the head of state. enemy groups have entered kyiv. >> reporter: any man out after curfew gets special attention from police. in kyiv even those fleeing through humanitarian corridors don't escape scrutiny. >> because we are afraid that russians may have sent some of their own. >> reporter: ukraine's rail chief says security has been beefed up to guard against saboteurs planting special targets to guide russian missiles. staff detained this man near kharkiv. >> engage them and send them to police -- >> reporter: how do you know for sure? >> russian documents. many other stuff. >> reporter: a few days into the war, vladimir's wife spotted suspicious vehicles without headlights at their home near