Fifteen Iranian students and researchers sued the Trump administration for completely halting student visa interviews while it determines whether to vet all visa applicants’ social media accounts.

The suit, filed against Secretary of State Marco Rubio in a Virginia federal court, claims that the pause on student visa interviews violates the Administrative Procedures Act, a law prohibiting capricious rule-making. The complaint is currently sealed.

In an email, Curtis Morrison and Hamdi Masri, lawyers for the students, noted that the State Department has required visa applicants to disclose their social media handles since May 2019. Visa applicants from certain Muslim-majority countries, including Iran, are already subject to “extensive social media vetting,” Masri said, adding that Trump seemed to want to “ensure students entering align with his political values.”

The students and researchers who brought the suit against Rubio were admitted to universities across the country — including Yale, Ohio State, and the University of South Florida — for graduate programs in computer science, engineering, finance, and other disciplines. Per their attorneys, each of the students had already attended visa interviews, but all of their applications are currently “awaiting national security vetting.” Some of the students were interviewed over a year ago.

The pause on student visa interviews is part of the Trump administration’s multi-pronged attack on universities and international students. On Wednesday, Rubio said the State Department would start working with the Department of Homeland Security (DHS) to “aggressively revoke visas for Chinese Students, including those with connections to the Chinese Communist Party or studying in critical fields.” On May 22nd, DHS rescinded Harvard’s access to a federal database used to track foreign students’ enrollment, putting nearly 6,800 people enrolled at Harvard at risk of immediate deportation until a federal judge intervened.

Rubio has also suspended the visas of international students involved in pro-Palestine protests on campus. More recently, the State Department restricted visas of “foreign nationals who are responsible for censorship of protected speech in the United States,” i.e., regulators who enforce the European Union’s Digital Services Act.