North Dakota sheriff investigates report of attack on pipeline protester

The Morton County Sheriff's Department is looking into what occurred, spokesman Rob Keller said in an email on Sunday, declining to comment further because the investigation is ongoing. Early on Saturday, protesters against the oil pipeline near sacred tribal lands briefly blocked two entrances to a work yard near the rural town of Mandan, causing workers to leave the area. Videos and pictures posted online show a man in a white vehicle holding a handgun and yelling obscenities while driving forward through a crowd of protesters.