Crews fight Warren house fire overnight

The Warren City Fire Department responded to a house fire early Saturday morning at 2 a.m.

They were called to reports of a structure fire on the 1200 block of Oak Knoll Ave SE.

Once on scene, crews saw flames coming out of the front window, but they were able to quickly control the blaze. 

No one was inside the home at the time of the fire, and crews believe it's a vacant structure. 

The cause of the fire is under investigation.