VIDEO: Just before 4am Friday, firefighters responded to a vacant duplex engulfed in flames near the intersection of N. Greene St. and E. Marietta Ave. When crews arrived on scene, flames could already be seen shooting through the roof but they were able to get the fire knocked down quickly. Once the fire was out, a backhoe was brought in to demolish the home. The duplex and two other homes on either side of it are vacant because they were set to be torn down for the North-South freeway. The cause of the fire is not known but fire officials suspect it could have been set by transients.