Flames erupted from the windows as firefighters battled the blaze, which officials said appeared to have started on the second floor before spreading through the building. (AP Photo/Yuki Iwamura) The fire broke out shortly before 1.40 am on 58th Street in the Sunset Park neighbourhood. Flames erupted from the windows as firefighters battled the blaze, which officials said appeared to have started on the second floor before spreading through the building. Four adults were pronounced dead at the scene, while two others, a man and a woman, died while being taken to hospital, according to the New York City Fire Department. Seven people were injured, including three firefighters. Four residents and three firefighters suffered non-life-threatening injuries, while another victim was reported to be in critical condition. The blaze was classified as a three-alarm fire, indicating that additional firefighting resources were required beyond the initial response. Fire crews remained at the property after bringing the flames under control, pouring water on the heavily damaged structure and checking behind walls and exterior siding for hidden pockets of fire. The front of the building was extensively charred, with large sections of its exterior destroyed. Two lithium-ion batteries were found at the scene, and investigators are examining whether they contributed to the fire. The cause of the blaze has not yet been determined. New York City Mayor Zohran Mamdani described the incident as devastating and praised firefighters for their response. He also highlighted concerns over the growing number of fires involving e-bike batteries. Mamdani said e-bike fires had increased to more than 400 in the city this year, warning that such incidents could cost people their lives and homes. Before Thursday's blaze, seven people had died in lithium-ion battery fires in New York City this year, according to the report. Four of those victims, a mother and her three children, were killed in a fire in the Bronx last week. The Brooklyn fire displaced multiple residents. The American Red Cross is providing temporary accommodation to those left homeless by the incident. Investigators are continuing to determine what caused the fire and whether the batteries discovered at the property were connected to its outbreak. Working as Copy Editor at the Business Desk of Times Now Digital. Dedicated towards crafting interesting financial stories. Previously covered financi... View More