WOLF BLITZER, CNN THE SITUATION ROOM HOST: Happening now, breaking news, terror attack. Three people are dead and 20 injured after an attacker plows through pedestrians right in the center of London and crashes his vehicle into a fence outside the parliament building. The assailant shot dead after fatally stabbing a police officer on the parliament grounds. Trump overheard, the Republican Chairman of the House Intelligence Committee goes public saying normal incidental intelligence collection may have picked up communications related to President Trump, but the committee's top democrat is very angry and is about to go public himself. We're standing by. Ties to Russia, former Trump Campaign Chairman Paul Manafort confirms he worked for a Russian billionaire tied to President Putin, but did he - did he represent Russian political interests? And down to the wire, the President has been shaking hands, twisting arms, counting heads, trying to lineup enough House Republicans to pass the ObamaCare replacement bill, but it's still too close to call and the White House says there's no plan B. I'm Wolf Blitzer. You're in</s>THE SITUATION ROOM. ANNOUNCER: This is CNN Breaking News.</s>BLITZER: Breaking news. We're covering two major fast-moving stories tonight. A bloody attack right in the heart of London in the shadow of Big Ben, puts Parliament on lockdown, closes the gates of Buckingham Palace, and triggers a full-scale terror investigation. At least three people were killed and 20 were hurt. It began when an attacker rammed a car into pedestrians on the Westminster Bridge the river Thames, then crashed into a gate outside the Parliament, got out and fatally stabbed the police officer on the Parliament grounds. The assailant was shot dead. Some of the injuries are described as catastrophic. One woman was pulled alive from the river. Also breaking at this moment, we're standing by to hear directly from the top democrat at the House Intelligence Committee, Congressman Adam Schiff. He's furious over actions by the Committee's Chairman who -
Police: 3 Killed, 20 Hurt In London; Attacker Dead.