Bigraphic Information News Today : Breaking News, Live Updates & Top Stories | Vimarsana

>> let's bring in chad sweet, former chief of staff with the department of homeland security also a former cia officer, co-founder and ceo of the chertoff group. also tom fuentes, juliette kayyem here. a lot of information here first and foremost the brothers believed to be from chechnya. let's start with that. >> couple points. one is, if they're in, fact, students at bunker hill college, there's the student immigration visa data base which will follow things like we'll know exactly their bigraphic information. there will have been fingerpr t fingerprints provided for the application. which w...

Police s.w.a.t. teams going door-to-door in watertown. they're asking people to stay home, lock your doors. do not answer your doors unless you see a bona fide law enforcement official outside. >> this is an ongoing investigation. we can't get into details on the descriptions of the suspects or the names. we're trying to get information out to the people who live here, that they should stay in their homes, and not open their doors unless police officers are there. there's a 20 block perimeter around the location that chief devoe just talked about. we are concerned about securing that area and ...

Around him. there's a lot of work that's being done behind the scenes that the american public doesn't see on going to the residence. right now i suspect his apartment is being forensically checked as well. there's going to be a lot more information coming forward in the next few hours. >> juliette, bunker hill community college, it's clear, he may be from chechnya via kazakhstan but he was living, existing here, studying to be an engineer. >> we had always believed that this was a boston-based attack simply because it seemed like the culprits probably built the bombs here. they probably walke...

Anyone in or out. when all of this started going on, when all of this began, he they were chasing that suspect, there was a witness who saw what -- who saw said it sounded like firecrackers with all the shooting what was going on. we have more information but i want to get back to you guys. >> don lemon in watertown, massachusetts. massive manhunt that's going on right now. we also have been learning from joe johns who we'll go to in a second that one of the reasons for all the concern is it's thought that suspect number two might be wearing some sort of explosive device. joe, what have you le...

Jake, john? >> all right, deb, thanks so much for that. as you alluded to, the associated press right now reporting the identity of the suspects saying they are brothers from chechnya. brothers from chechnya. that again coming from the associated press. we will have more on that as more information comes in. >> at one point before we go to don lemon who is also in watertown, we can't really say this enough. if you live in watertown or the surrounding area and you're turning on your television, you don't know what's going on, the most important thing right now, stay in your home. do not leave. ...