A fire early Sunday caused heavy smoke damage to the Natural Foods Co-op, at 2504 South Duluth Avenue.

Sioux Falls Fire Rescue crews were called at 3:19am, and the first units to arrive found smoke coming from the building.

The fire was under control in approximately five minutes, but crews stayed on the scene until 6am.

No one was in the building at the time, and there were no injuries.

The cause is under investigation.