Mahmoud Khalil, a prominent Palestinian activist who helped lead Columbia University’s student protest movement demanding a ceasefire in Gaza, was arrested Saturday night by federal immigration authorities,

Israel protests on campus, was at home Saturday night near Columbia’s Manhattan campus when several immigration agents entered his apartment and took him into custody, his attorney said.

Immigration officers arrested a recent Columbia University graduate over his role in pro-Palestinian activism, a dramatic escalation of the Trump administration’s offensive against students protesting Israel at the school.