complex in the bronx. what s the investigation looking into right now? reporter: there s a number of things they are looking into. one is why that south closing door didn t shut. the fire was in one apartment building which was two floors and because that door didn t shut, we re told the smoke was just able to go right up to this 19 story building hitting every floor, essentially suffocating and blinding many of the people trying to escape. why were fire alarms going off at many times not just from this one prior days and weeks before this according to some residents and reports. they would ignore this fire alarm that happened just yesterday. then just a fire code in general. these are the answers they are trying to get according to the mayor. what an incredible tragedy that has really happened here in this building in the bronx where people were just trying to get