Three left-leaning news websites alleged in a new lawsuit that OpenAI stole their content and used it to train its artificial intelligence model, adding to a string of legal efforts by news media to win compensation from the tech company.

The websites Raw Story and Alternet filed a joint suit in federal court in Manhattan on Wednesday against OpenAI, followed by a similar suit by the Intercept. The two suits allege that OpenAI’s ChatGPT copied their data and violated the Digital Millennium Copyright Act in the process. Other publications, including the New York Times, have also sued OpenAI over copyright claims.