The Columbus Fire Department has listed the cause of the Jan. 24 Carpet Mania fire as undetermined.

The four-alarm fire damaged three local businesses, destroying the carpet business and a CrossFit facility. A third business, Advantage One Imaging Center, had significant water and smoke damage, firefighters said.

The National Fire Protection Association classifies the causes of fire in four categories:

  • Accidental (not a deliberate human act)
  • Natural causes (lightning, earthquake, wind)
  • Incendiary (set deliberately when a fire should not have been set
  • Undetermined (cause cannot be proven)

For more on this story, see Wednesday’s Republic.