blast site saturday triggered fears are of toxic smoke billowing back into populated areas. bus loads of families brought to this emergency shelter. hundreds on the ground still don't know the list of toxins. there are a lot of questions about a lack of oversight. >> chinese personnel at this site interrupted our live report. the government has sensored critical news reports and media posts, fueling reports of a cover-up. >> turn off your camera. >> that's will ripley reporting for you. israeli forces shot and killed a palestinian man suspected of stabbing an israeli border police officer. he was stabbed in the west bank on saturday.