this man said he was praying when the blast blew a door right of his head. the victims carried by bystanders over rubble from damaged buildings and rushed to nearby hospitals. >> a bomb, the twin suicide bombing went off. the area is mostly empty. it's been cordoned off by the army. otherwise, there is a it lo of shattered glass on the street and a lot of blood. it's a scene of chaos and carnage. >> reporter: within hours, isis claimed responsibility. this neighborhood is a stronghold of hezbollah, fighting along bashar al assad's regime. >> isil doesn't think of itself as having borders. let's remember why you say isis i say isil, they say is the stlamic -- islamic state. and they are trying to establish a caliphate which means an islamic government covering all the areas where muslims live today in the world,