Investigators are trying to figure out what started a duplex fire on Spartanburg east side.
A neighbor noticed the flames and called 911.
Crews were called to the home on Fernwood Glendale Road around 3:00 A.M.
No one was inside at the time and no injuries have been reported.
Firefighters tell us the attic was fully involved when they arrived on scene.
Investigators are trying to figure out how it started.