Detailed text transcripts for TV channel - CNN - 20171124:17:17:00
Until they know for a fact, but they usually know quickly. >> as well as tech correspondent in london, what are you learning and about where are you? >> we are in the city in central london. this is the oxford circuit underground. this entire area was teaming with people on this very busy friday evening. now where i am standing, the police are evacuating a wide area. they are trying to direct people away from this area. i know you have been talking about this and advising people to get away or seek sheller in nearby buildings. what we have seen in a couple of occasions, they have been brief
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