Tribe spokesman Steve Sitting Bear said protesters reported that six people had been bitten by security dogs, including a young child. At least 30 people were pepper-sprayed, he said. Preskey said law enforcement authorities had no reports of protesters being injured.There were no law enforcement personnel at the site when the incident occurred, Preskey said. The crowd dispersed when officers arrived and no one was arrested, she said.The incident occurred within half a mile of an encampment where hundreds of people have gathered to join the Standing Rock Sioux tribe’s protest of the oil pipeline that is slated to cross the Missouri River nearby.The tribe is challenging the army corps of engineers’ decision to grant permits for Dallas-based Energy Transfer Partners’ Dakota Access pipeline, which crosses the Dakotas and Iowa to Illinois, including near the reservation in southern North Dakota. A federal judge will rule before 9 September whether construction can be halted on the Dakota Access pipeline.Energy Transfer Partners did not return phone calls and emails seeking comment.The tribe fears the project will disturb sacred sites and impact drinking water for thousands of tribal members on the Standing Rock Sioux reservation and millions farther downstream.