Hectorville - Fire investigators say they believe an electrical overload caused a fire that killed two and injured two others Tuesday morning near Hectorville.

45-year-old Payne Rowen and his 8-year-old son Nikolas were killed when the fire ripped through their home. Rowen's wife, Joy, and their 3-year-old son, Alex, were injured. Joy Rowen was released from a Tulsa hospital Wednesday while Alex remains in the hospital, but is getting better.

State fire officials now say it appears the fire started in an area where several computers were plugged in, overloading the circuit, which in turn caused a short that may have caught the walls or carpet on fire.

Fire crews from several surrounding areas battled the fire, but their efforts were hampered because the nearest hydrant was nearly a half mile away.