WEST PALM BEACH, Fla. – The National Archives said Saturday it made a mistake when it blurred images of anti-Trump signs used in an exhibit on women's suffrage. The independent agency is charged with preserving government and historical records and said it has always been committed to preserving its holdings “without alteration.” But the archives said in a statement Saturday “we made a mistake." The archives' statement came one day after The Washington Post published an online report about the altered images. The archives said the photo in question is not one of its archival records, but rather was licensed for use as a promotional graphic in the exhibit. “Nonetheless, we were wrong to alter the image,” the agency said. The current display has been removed and will be replaced as soon as possible with one that uses the original, unaltered image, the archives said. The exhibit about the 19th Amendment, which gave women the right to vote, blurred some anti-Trump messages on protest signs in a photo of the 2017 Women's March in Washington. Signs that referred to women's private parts, which also were widespread during the march, which was held shortly after Trump took office, also were altered. The archives said it will immediately begin a “thorough review" of its policies and procedures for exhibits “so that this does not happen again.” The American Civil Liberties Union called on the archives to issue a more detailed, explanation. “Apologizing is not enough,” Louise Melling, the organization's deputy legal director, said in a statement.