VIDEOS: An explosion rocked a New Jersey apartment building Friday afternoon as fire department crews raced to put out flames shooting out of the structure. A multi-level apartment building in Carteret had heavy smoke and tall flames shooting out from much of the roof by 2 p.m. At one point an explosion could be seen in the middle of the roof and the top floor of the building. Nine hours after the fire began, firefighters were still pouring water on hot spots. By the time fire teams were able to get control of the fire and extinguish most of the blaze, 48 units had been damaged and 75 residents were displaced. A city spokesperson called the building a complete loss. One single mother who lived in the building was devasted to learn everything had been burned.