Scores of people poured into the lobby of Trump Tower in New York City on Thursday to protest the arrest and detention of Columbia University student Mahmoud Khalil, whom the Trump administration aims to deport over his pro-Palestinian activism.

The university sanctions demonstrators involved in pro-Palestinian protests last spring while the arrest of organizer Mahmoud Khalil has become a flashpoint on the rights of legal U.S. residents and free speech.

NEW YORK (AP) — Demonstrators from a Jewish group filled the lobby of Trump Tower on Thursday to denounce the immigration arrest of a Columbia University activist who helped lead student protests on the Manhattan campus against Israel’s war in Gaza.