NEW : A third person who was not identified was injured in the shooting , Gonzalez said . National Guard confirms the victim was one of theirs . The decades - old man was killed in the border city of Ciudad Juarez . Service members are told to stay away from the border city .
NEW : National Guard confirms the victim was one of theirs . The decades - old man was killed in the border city of Ciudad Juarez . Service members are told to stay away from the border city .