ANNOUNCER: This is CNN breaking news.</s>CUOMO: All right, ISIS is now claiming responsibility for the deadly terror attack in London. Eight people are under arrest so far. Authorities say the attacker was known to investigators. We have CNN's Nic Robertson live in Birmingham, England, with all the breaking details. They had said ISIS-inspired. Now the terror group comes out and owns it.</s>NIC ROBERTSON, CNN INTERNATIONAL DIPLOMATIC EDITOR: They do. They say that he was a soldier of theirs, a soldier of ISIS. We've heard this sort of language from ISIS before claiming attacks. This has come through Amak (ph) news agency. The news agency that's loosely affiliated with ISIS. They did this around the Nice attack last year in France. Now they're doing it again here in Britain with this attack that followed a very similar style. Arrests behind me here overnight. Three people taken away during an armed raid police. Very unusual for an armed raid in Britain. Police went in using battering rams. We have heard from the British prime minister today giving us details about this attacker. British-born, she said, known to the intelligence agencies, known to MI5. They pulled him in for questioning before relating to another incident several years ago. They decided at that stage that he was periphery to the investigations. They had decided more recently that he was impertinent to any ongoing reasons to surveil him or have closer -- to have cause to keep a closer eye on him. But right now, we don't have an identity. The police not giving that. But British-born. ISIS now saying he was one of their soldiers. Alisyn.</s>CAMEROTA: Oh, Nic, I mean you just proved the point, investigators only need to be wrong once. That's how big their challenge is every day. Thank you very much for that reporting. Is the cloud of Russia affecting President Trump's ability to govern and push through his agenda? We get "The Bottom Line," next.
ISIS Claims Responsibility for London Attack