The Department of Homeland Security announced on Wednesday that it is subpoenaing Harvard University for international student records as the Ivy League institution battles the Trump administration’s ban on foreign students in court. 

The agency said it is sending Harvard administrative subpoenas to hand over data regarding its Student Visitor and Exchange Program dating back to 2020 after the school denied previous “non-coercive” requests to do so. DHS is seeking information about foreign students related to “the enforcement of immigration laws” amid the Trump administration’s search for students suspected of harassing Jewish classmates and sharing ties with the Chinese Communist Party.