Nov 13 (Reuters) – North Dakota authorities are investigating a weekend incident in which pipeline protesters said a woman was struck by a man driving a truck who drove over her feet and fired shots into the air. 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. One video shows the man later raising his gun into the air and firing several shots, although it is not clear from the video whether […]