Federal officials are investigating several fires seen Saturday night along the Bakken Pipeline construction site in Jasper County, Iowa.
Suspected to be arson, fires engulfed construction equipment, including a backhoe and two bulldozers.
Although the scene is still under investigation, fire chiefs suspect that pipeline protestors started the fires.
The fire follows another that occurred in August, where protestors set construction equipment on fire in Jasper County, causing $1 million worth in damages.
According to officials, no one was injured in the fires found Saturday. The investigation is ongoing.
KCCI Des Moines