A Guatemalan woman filed a federal lawsuit Tuesday after she was separated from her 7-year-old son at the U.S.-Mexico border. The suit, believed to be the first challenging the Trump administration’s zero-tolerance policy, is on behalf of plaintiff Beata Mariana de Jesus Mejia-Mejia and her son. New York Gov. Andrew Cuomo announced Tuesday that the state would soon also be filing a “multi-agency” lawsuit, saying in a press release that “the government is violating the Constitutional rights of thousands of immigrant children and their parents.” The American Civil Liberties Union filed a federal class-action suit over the separations of detained families in March, before Attorney General Jeff Sessions announced the zero-tolerance policy. De Jesus Mejia-Mejia’s lawsuit says she and her son came to the U.S. from Guatemala in May and were originally detained together before being separated. She has been released on bond, but is still separated from her son.