to hospital. it takes a couple days for the major counter terrorism police to start leading the investigation. a bar nearby closed after the scene. an extraordinary phrase, attempted murder using a nerve agent. is hunt is on and they won't say how it's going. it's not something you can leave lying around in the hope that your target will walk into it. these two people were specifically targeted. the police said they're looking at closed circuit television cameras single afternoon. with anybody else, frart that policeman and first on the scene there, if anybody else was sick too. they possibly may have been involved in administering it. >> so what does britain do next? >> this is enormous question. this is not the first time it's happened. 12 years ago, alexander lipman, seekingasylum.