Nightly News   |  April 15, 2013

How many bombs were planted?

Authorities are destroying five other packages found on the streets of Boston and there is reason to think some of them were explosive devices. Officials currently believe the threat is confined to Boston, and while there is not yet a suspect in custody, authorities say some people are being questioned including a young person who was in the U.S. on a student visa. NBC’s Pete Williams reports.

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>>> to washington we go. our justice correspondent pete williams has been working this story all day. pete, what can you tell us tonight?

>> tonight authorities confirm that there were two bombs. we know that much. but it's unclear how many others were planted. they say there were other suspicious packages. and the word, of course, of another bomb elsewhere placed at the jfk library is apparently turning out not to be true. at least five other packages have been found on the street, have been deemed suspicious and are being destroyed. but there is no firm confirmation of whether they were actually explosive devices although some officials tonight say there is reason to think that some of them were. we are told, by the way, that one of the two victims killed in the explosion was 8 years old. boston police say there was no specific intelligence warning of any kind of attack. federal officials tonight say there is no reason to think that this is part of any larger threat. at this point they believe it is confined to boston. but a meeting tonight will decide whether any kind of national alert will be sent out. there is no suspect in custody, authorities say. but some people are being questioned including some with injuries who were taken to boston hospitals. one of those, a person in whom there is some interest is a young person who was here on a student visa . brian?

>> pete williams in our washington newsroom. we'll look for further details from there. pete, thanks.