VIDEO: The Spokane Fire Department has determined the cause of a deadly house fire that killed two parents and left two children on life support. According to SFD, an extension cord used in place of permanent wiring was the found to be the cause of the fire on N. Howard St. Firefighters says the fire started on the house's front porch and quickly spread upstairs where the family was located. SFD notes there were no functional fire alarms in the house. The two parents killed in the fire have been identified as 40-year-old Robert Desislets and 33-year-old Arielle Desislets. The Spokane Medical Examiner has ruled Arielle's cause of death as inhalation of products of combustion and thermal injuries. Her death was ruled an accident. Robert's cause and manner of death are pending.