Just prior to 9:00pm last night, deputies responded with fire personnel to the report of a house fire in the 36000blk of Stacey-Gateway Rd. in Pleasant Hill. Much of the house had burned before the fire could be contained. A single deceased person was located inside. Although not officially identified at this point, authorities believe that the deceased is likely the 86 year old male resident. The cause of the fire remains under investigation. Additional details will be released when available.