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

Mahmoud Khalil was picked up by immigration officers who said they were acting on State Department orders to revoke his green card, his lawyer says.

Federal immigration authorities arrested a Palestinian graduate student who played a prominent role in last spring’s anti-Israel protests at Columbia University, according to his attorney. Mahmoud Khalil was inside his university-owned residence Saturday night near Columbia’s Manhattan campus when several Immigration and Customs Enforcement agents entered the building and took him into custody,