The victim of Wednesday's house fire in Winsted was a man, but his identity has not yet been released, according to the fire marshal.
After the fire was extinguished, firefighters searched the house and found the man and a dog dead inside.
There were no other injuries reported.
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The Office of the Chief Medical Examiner is conducting an autopsy to positively identify the victim and to determine his cause of death, according to the fire marshal.
The cause of the fire is still under investigation, but in a news release on Thursday, the fire marshal urged residents to use caution when using space heaters or other heating appliances and to make sure to follow the manufacturer's recommendations on clearances to combustibles.