A federal judge on Thursday temporarily blocked President Donald Trump’s efforts to block visas for foreign students planning to attend Harvard, after the Ivy League college filed a legal challenge.

U.S. District Court Judge Allison D. Burroughs granted a temporary restraining order that enjoins anyone from “implementing, instituting, maintaining, enforcing, or giving force or effect to the Presidential Proclamation” that Trump issued Wednesday.

Harvard had earlier Thursday amended its complaint against the Trump administration to challenge Trump’s proclamation that the president issued the day before.

It would have denied visas to foreign students who planned to enter the United States to study at Harvard, in his latest attack on the prominent university.