OKLAHOMA CITY - Fire crews were busy Sunday morning battling a blaze on the northwest side of Oklahoma City. It broke out just after 4 a.m. near NW 40th and Classen.

Crews on scene said the blaze started in the back of the house. The cause appears to be electrical in nature.

The home is currently unoccupied. It's estimated that the structure sustained $8,000 to $10,000 in damages.