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Firefighters from Poplar, Millwall, Euston and surrounding fire stations attended the scene. Specially-trained firefighters carried out a "systematic sweep" of the property to detect any hazardous materials and ventilate the scene. The incident was over for crews by 16:25, the brigade added. A council spokesperson said their thoughts were with the family of the young child. "Details about the exact nature of the incident are not yet clear and the Metropolitan Police will remain on the scene as the investigation progresses," they said. "As a council we have taken speedy measures to ensure those residents who were evacuated are being cared for in a warm, safe environment."