SIOUX FALLS, S.D. -

A Sioux Falls business is left picking up the pieces after a major fire early Saturday morning ruins the majority of their equipment.

Sioux Falls Fire Rescue responded to a reported structure fire at Dakota Road Builders on E. 60th Street N. at approximately 3:40 a.m. Saturday.

No one was inside the building at the time of the fire which stored construction equipment.

There was severe damage to the roof of the building and smoke damage throughout. The fire was under control in approximately 40 minutes and there was no sprinkler system in place.

Co-owner Lincoln Rupp says the inside of the building is a total loss, and it's still too early for them to know what's next for their business.

"We're still wrapping our minds around it, still digesting it all. It's quite a shock. I guess it'll be sinking in over the weekend and we'll be discussing it and see what we can do from here," said Rupp.

Rupp says fire officials determined the fire started do to an issue with the furnace and electrical system.

No injuries were reported.

Sioux Falls Fire Rescue responded with 4 fire apparatus, 2 support units, 1 Command unit and 23 personnel. SFPD, SF Public Works, MidAmerican Energy, and EXEL Energy also responded to assist. Sioux Falls Fire Rescue reminds residents to have your heating system checked and serviced before the winter season begins.