FDNY on Instagram: "Just after 8:00 Wednesday morning, FDNY members responded to reports of an explosion at 207 Alexander Avenue in the Bronx. Units arrived at a collapsed structure attached to the building. There are no reported injuries. “We responded in less than four minutes. Numerous FDNY and EMS units responded to the scene. We ran our dogs over the pile of bricks which is the structure that collapsed. It is a ventilation shaft connected to the boiler. We believe that’s where the explosion