An explosion was reported in downtown Nashville early Christmas morning that was felt for miles. Police and firefighters responded to an area near Second Avenue and Commerce Street about 6:45 a.m. Friday. Officials are on the scene trying to put out the fire and see if anyone is inside the building. There were initial reports of structural damage but no immediate information on whether any people were injured. Images and videos taken in the area showed flames and smoke — which could also be seen from miles away. Alarms inside several buildings were heard going off with water pouring into some buildings with structural damage and broken windows. Trees lining Second Avenue were blacken from the incident. This is a developing story.