NORWALK - A married couple is dead after an early morning fire in Norwalk.Officials say the fire broke out at around 1:30 a.m. Tuesday at the couple's home on Carlin Street. According to officials, the second story of the home collapsed onto the first floor, which made it difficult for firefighters to get inside.Fire officials say Norman and Joyce Hunt, both in their 70s, were in their bedroom on the second floor and were not able to escape. Investigators are looking at all of the mechanical and electrical aspects of the home to determine what caused the blaze. Officials say they will be bringing in dogs to sniff for accelerants, as patterns were found in the home that may be questionable.