Grade Explosive News Today : Breaking News, Live Updates & Top Stories | Vimarsana

Thousands of people are going about their work today. but it is not business as usual by any means. about 15 blocks of this downtown area shut down. a crime scene now patrols by national guards. this is what's happened since you went to sleep last night. we mentioned that 8-year-old richard martin among the three people killed. our boston affiliate whth reporting that his mother and 6-year-old sister also among those injured. as chris said the sister losing a leg. the mother having surgery overnight, possibly suffering a brain injury. another 144 are injured, including 17 people in critical co...

This a terror attack, what goes into a definition like that? >> reporter: well, there's no question that it was a planned, coordinated attack intended to cause causalities. the point about this being small 5: packages, wolf, we're fortunate there would have more greater causalities if the packages themselves had been larger. while we know there are causalities and that's tragic, it's fortunate that this wasn't either a higher grade explosive or a larger device, which would have caused more causalities. >> let me bring tom fuentes into this discussion, former assistant fbi director, also a cnn ...

And injury and death tonight and authorities in boston are combing the city trying to get clues to help them find the person or people responsible for the deadly terror attack today. the fbi, atf, state police are all involved in the investigation. president obama vowed to find out who did this but at this moment there are no suspects in custody. "outfront" tonight, former fbi assistant director tom fuentes and fran townsend. what is the latest can you tell us from your reporting of what we know right now? there are so many question marks. >> and there remain a lot of questions, erin. we know ...