(AP) — A civil liberties group filed suit Wednesday to block a new Arkansas law requiring voters to show photo identification at the polls before it is enforced for the first time state-wide in the primary election next month. The lawsuit, which also was backed by civil rights advocacy group Arkansas Public Law Center, says the requirement "placed additional qualifications and impairments on Arkansas citizens before they can exercise their state constitutional right to vote." The voters cited by the lawsuit include Barry Haas, a Pulaski County resident who refused to show ID when casting a ballot in a March 11 special election. According to the suit, Haas cast a provisional ballot that wasn't counted since he didn't show ID. The Pulaski County Election Commission has sued the state Board of Election Commissioners for adopting a rule that gives absentee voters additional time to show proof of ID.