Another investigation is underway after a tanker truck slammed into a building in Concho on Tuesday.
The tanker smashed into the Economic Development Center for the Cheyenne and Arapaho Tribe.
Authorities are already investigating three suspicious fires at the courthouse, a newspaper office and a barn in Concho early Tuesday morning.
Authorities do not know if the fires and this truck crash are related. Investigators say the driver of the truck was not found at the scene and there have been no reports of injuries.
The tanker was stolen from a nearby construction project.