Those who were questioned in Texas and Arizona are in addition to 59 others who were on a list to be pulled aside in San Diego, as first reported by NBC News.
DHS did not respond to a request for comment. The DHS Office of Inspector General declined to say whether it would expand its probe to other parts of the border beyond El Paso.
DHS officials have said there is no policy that targets lawyers and journalists, but they do have broad authority in who they choose to stop for screening.