From NPR.

Federal immigration authorities arrested a Palestinian activist Saturday who played a prominent role in Columbia University’s protests against Israel, a significant escalation in the Trump administration’s pledge to detain and deport student activists.

Mahmoud Khalil, a graduate student at Columbia until this past December, was inside his university-owned apartment Saturday night when several Immigration and Customs Enforcement agents entered and took him into custody, his attorney, Amy Greer, told the Associated Press.

Greer said she spoke by phone with one of the ICE agents during the arrest, who said they were acting on State Department orders to revoke Khalil’s student visa. Informed by the attorney that Khalil was in the United States as a permanent resident with a green card, the agent said they were revoking that instead, according to Greer.

Khalil’s arrest is the first publicly known deportation effort under Trump’s promised crackdown on students who joined protests against the war in Gaza that swept college campuses last spring. The administration has claimed participants forfeited their rights to remain in the country by supporting Hamas.