Former Russian Spy Poisoned in U.K. Park
BLITZER: A former Russian double agent is in critical condition after being exposed to what authorities are describing only as an unknown substance. Russia is denying any involvement. Let's go to our international correspondent Phil Black. He's in Salisbury, England. Phil, have police discussed a motive for the attack?</s>PHIL BLACK, CNN INTERNATIONAL CORRESPONDENT: Wolf, not specifically yet. But today, the British foreign secretary, Boris Johnson, walked a very delicate line between almost threatening Russia and, at the same time, not yet accusing Russia of being directly involved in this just yet. But the shadow of Russia hangs all over this because of an incident that was very similar in many ways, the targeted assassination of a former Russian agent back in 2006 in London. Back then, the substance was a highly radioactive substance, Polonium-210. Now, this time, the authorities say they're still working to find out precisely what the unknown substance was. But it's had this very grave effect on the former Russian agent. The involvement of anti-terror police, they're leading the investigation not because they believe this is a terror incident, but because it's been determined that this case needs their specialty, their capabilities, their resources to get to the bottom of what precisely has caused this. The former agent we're talking about, Sergei Skripal, he was a former officer in the Russian military intelligence. In 2006, arrested and accused of selling secrets to British intelligence. Then in 2010, he was part of a spy swap between Russia and the West, and he came to settle here in a part of southern England that is really known for being quite beautiful and pleasant and quiet. It seems he has tried to carve out a life for himself in the years since. That all dramatically fell apart on Sunday afternoon when he was found collapsed on a bench just in the park behind me, along with his 33- year-old daughter, Yulia. The authorities are now scrambling to find out why and how this happened. And it's possible that the facts, once they're revealed, could really violently shake up relations between Russia and the United Kingdom -- Wolf?</s>BLITZER: Let's see what happens. Phil, thank you very much for that very disturbing report of Phil Black, from England. Other news we're following here in Washington, are Republicans on Capitol Hill getting ready to shut down the House Russia investigation? The House Intelligence Committee investigation. There is new information. We'll be right back.