Youngstown Fire Department responded to a house fire at 135 Millet Avenue on the West Side of Youngstown around 5 a.m. Thursday morning. 

The owners of the home were not home at the time of the fire, and there are no serious injuries. 

Youngstown Fire Department tells us that the fire started in the walls and spread to the attic, and then reached the roof. 

The roof sustained serious damage. 

The cause of the fire is believed to be electrical but is still under investigation.