Demonstrators plan to take over Federal Plaza in New York City on Monday to demand the release of Mahmoud Khalil, a Palestinian activist and Columbia University graduate arrested by federal immigration agents.

Khalil's arrest is the first known deportation effort under Trump’s promised crackdown on students who protested the war in Gaza.

Agents told Mahmoud Khalil’s attorney that they were revoking Khalil’s green card. He is legally considered a permanent resident.