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,

U.S. immigration agents arrested a Palestinian graduate student who has played a prominent role in pro-Palestinian protests at New York's Columbia University as part of U.S. President Donald Trump's promised crackdown on some anti-Israel activists.

Mahmoud Khalil is being detained as his lawyer fights for his release. A Palestinian protest leader at Columbia University was arrested by Department of Homeland Security agents Saturday night despite having a green card, his attorney said.