crowd, maximizing saz you'llties. -- casualties. a third bomber, killed by the blast before he could detonate his own explosionives. but a fourth was allegedly captured, seen here taken away as security forces fire into the air to clear the crowd. 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 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. the lebanese fish fighting