From Roanoke Fire-EMS: Early this morning around 12:20 am crews responded to a fire in the 1000 block of 12th St., SE. This is the third fire at this vacant house this year and the cause has been ruled as incendiary (intentionally set). No injuries were reported. If you have any information about this fire, please call the Roanoke Fire Marshal’s Office at 540-853-2795.