A massive three-alarm fire tore through a residential building in Sunset Park, Brooklyn, early Thursday, killing six people and injuring seven others

A massive three-alarm fire tore through a residential building in Sunset Park, Brooklyn, early Thursday, killing six people and injuring seven others, including three firefighters, according to the FDNY. Four victims died at the scene, while two others died at a hospital. More than 200 emergency responders battled the blaze. Hazmat teams were called after a lithium-ion battery was discovered, but investigators have not determined whether it caused the fire.