you're watching krscnn newsroom. i'm natalie allen. >> and i'm george howell. >> devil sylva is now in police custody. supporters tried to black his car as he left the union headquarters where he had been avoiding arrest. he was considered a front runner in the coming election. >>> the focus is to agree on a location for the historic meeting. no date has been set but it could be in late may. >> we warn you the video is quite dit tsturbing. >> at least 48 people are reportedly killed. syria says it was not behind the attack. >> it's what they say. this video shows victims being washed in an effort to clear away the toxic residue. it shows children and adults and babies foaming at the mouth. others convulsing appearing paralyzed. >> steven is the chief diplomat. thank you for being with us. these images are difficult to watch but important to welcome at them. they really showed the detail these experts will look at to determine what happened. what's your view from what you have seen here? does it change the dynamic in