this man said he was praying when the blast blew a door right over his head. the victims carried by bystanders over rubble from damaged buildings and rushed to nearby hospitals. >> the twin suicide bombing went off the area is mostly empty, it's been cordoned off by the army. otherwise there's a lot of shattered glass on the street, a lot of blood. and it's really just a scene of chaos and carnage. >> reporter: within hours isis claimed responsibility. this neighborhood is a stronghold of hezbollah, the lebanese militia fighting alongside bashar al assad's regime in syria. isis' sworn enemy there. >> isil doesn't think of itself as having borders. let's remember why you say isis, i say isil, they say i.s., the islamic state. and they see themselves as trying to establish themselves as a caliphate which means