Authorities Investigate Bombing Suspects' Global Connections

Martha Raddatz on the Boston Marathon bombing suspects and where they might have come from.
2:08 | 04/19/13

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Transcript for Authorities Investigate Bombing Suspects' Global Connections
ABC's Martha Raddatz now on the developing information about the suspects international connections and what we're learning at this hour and -- We believe that these two men reported to be Brothers. Are in fact from overseas as George mentioned possibly from Chechnya. Tell us what we know with this point what we've been able to confirm. Well I've been told there either from Chechnya or Turkey is the way they're leaning at this point. Yesterday. It was made very clear to me that they were still intensely. Checking international. Connections. They said they have the whole of government trying to find out whether the suspects had other people who were helping them. Now in many ways as Brad Garrett pointed out it was a sophisticated attack it was pre planned. On the other hand that they didn't understand that there would be surveillance cameras at the Boston Marathon. If in fact they believed it kick in Cambridge for several gears certainly people would recognize them if those pictures got out. So in that sense there is some cautioned that they may not be affiliated with another salvation -- may have done this on their -- but it's something they're looking -- intently and Martha certainly how they handled themselves afterwards robbing a 7-Eleven -- imply sophistication either that. That's that's exactly right -- the fact that they would go in and rob -- 7-Eleven have no real escape plan but it also leads you to believe is Brad pointed out that they may have had something else planned. In the neighborhood in the Boston area and -- talk a little bit about because initially there were silly questions about whether or not this was homegrown terrorism someone from the United States. If this in fact is tied to some sort of international ring or at least some international training what's the impact of that. Well I I think one of the things they were very concerned about if -- international connections. Is is this the beginning of something is this going to happen again are -- other people out there. People talking about a domestic attack felt like it would be -- -- this would be yet these guys proved their point but the international thing really really raises the red flag. On whether someone else is out there and whether more attacks -- plant.

This transcript has been automatically generated and may not be 100% accurate.

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