(HURON COUNTY) -- Fire investigators say the cause of a fatal trailer house fire near Port Austin Saturday night is unknown. The blaze at 279 Walker Road claimed the life of 83-year old Lorna M. Knoblock. Reports say damage to the trailer home was extensive and the structure was a total loss resulting in an inconclusive cause. The fire was reported by a passing motorists shortly before midnight. The Port Austin Fire Department was assisted by the Kinde Area Fire Department and deputies from the Huron County Sheriff's Department. The victim was found in a bedroom. It is believed Knoblock died from smoke inhalation.