The Trump administration has revoked Harvard University’s ability to enroll international students in its escalating battle with the Ivy League school.

On Thursday, the university denounced the Trump administration’s announcement, saying “this retaliatory action threatens serious harm to the Harvard community and our country.”

The Trump administration blocked the admission of new international students into Harvard University as the president engages in a wider feud with the school. Homeland Security Secretary Kristi Noem chastised administrators in a letter for failing to properly address the Trump administration’s concerns over antisemitism,