U.S. District Judge James Boasberg is expected to rule Friday on the tribe's request to temporarily stop construction on the Dakota Access pipeline. The Morton County Sheriff's Office said Wednesday in a statement that it's "preparing and planning for all scenarios that may occur in response to the federal court ruling." The statement didn't say how many officers were being added. No law enforcement personnel were present Saturday when violence broke out between private security guards and protesters. Authorities say the crowd dispersed when officers arrived and no one was arrested. The pipeline's planned route in Illinois would come through western Illinois and go south of Springfield, to the southern Illinois town of Patoka.