A massive fire ripped through a South Los Angeles mattress and box spring warehouse, destroying it early Thursday.

The blaze was reported around 5:30 a.m. at the intersection of Maies and 76th Street.

The fire was still smoldering hours later and firefighters remained on scene making sure all hotspots were fully extinguished.

No injuries were reported. One adjacent home sustained some damage.

The cause of the fire remains under investigation, but neighbors believe a nearby power pole transformer flared up and started the fire.