with egyptian investigators still poring over the wreckage of the metrojet 9268 for clues, today egyptian president abdul el sisi visited sharm el sheikh seeking to calm fears. >> translator: this was an i isolated incident. >> reporter: still, u.s. lawmakers briefed on the intelligence are already identifying isis as the likely suspect. >> everything that i've seen i am almost ready to conclude that it was isis, that it was either isis or an isis affiliate. and to me i think that is the general consensus. >> if isil within hours of an explosion like that takes credit, you've got to seriously look at what involvement they may or may not have had. >> reporter: u.s. intelligence has not made a definitive conclusion as to what brought down the jet, however isis' sinai affiliate remains the only group that has claimed responsibility. and britain's foreign secretary says that claim and other intelligence pointds to either isis itself, an isis affiliate