Ta Pt News Today : Breaking News, Live Updates & Top Stories | Vimarsana

Fingerprint of the individual who made it. >> reporter: a british security source tell us cnn a timer was found on the device, that it's clear that although this was a crude bomb, it was intended to cause much greater damage. >> we're only aware of one device, so we now have remnants of that device. it's been examined by our experts. >> reporter: one source briefed on the investigation says an initial assessment of the bomb indicates it's highly likely to have contained ta pt, an unstable explosive that packs a nasty pufrmg. this video shows it kbusing just from a typey film canister. >> it is...

>> you're absolutely right. and in a way the crudeness of the devices which are forced upon the terrorists actually makes it harder for law enforcement because you can't use a cell phone to debt nature. you can't radio debt nature an explosive device in the tube. so you have to use a timer or something like that. while that complicates it for the terrorists, it makes it infin atel harder to detect. you can't jam cell phone signals, but again, it makes it much more critical and it makes it harder for the terrorists to determine where the explosive is going to go off unless they're standing ther...

Know or at they at least have a suspect and likely know that there is more explosive material out there that hasn't been used or there could be people who are unaccounted for. >> i see. and so as for the device, analysts say it appears to be crudeel made. it did have a timer. it may have contained explosive ta pt. what does that say? how does that give them information? >> it gives them a wealth of information. first of all, ta pt is very hard to make without killing yourself. and it is very hard to get to go off when you want it to. the and what it says is this was an amateur. this is not som...

Does this look like the mark of isis or is there any way to know that? >> ta pt is certainly the go-to explosive for isis right now because you can make it at home with peroxide and as he tone which you can get in stores. but they're going to claim it no matter what. and i don't believe it was anything more than an isis inspired attack, if that. it was somebody who was not in contact with them, who took this upon themselves to do it for whatever reason he felt he needed to contribute to jihad. >> and as far as trying to thwart these type attacks, steve, london has been hit over and over again ...