Sitting Bull was later arrested in an attempt by US authorities to suppress Sitting Bull's endorsement of the Ghost Dance which they considered a religious disturbance. The two Native American policemen sent to arrest Sitting Bull killed him. Following the death of Sitting Bull, a conflict arose that resulted in the Hunkpapas and Minneconjous tribes fleeing Standing Rock. Deciding against further resistance, the tribes join Red Cloud at Pine Ridge where they encountered Major Whitside in late December 1890. The tribes are subsequently directed to Wounded Knee, where a member of the Minneconjou tribe called Black Coyote refuses to surrender his rifle. The army reacts with violence which results in the deaths of 150–350 Native Americans and 25–31 US Army soldiers. The Lakota who survived the assault fled to Pine Ridge, and returned to Wounded Knee the next day only to bury their families and comrades.