DHS agents detained Khalil, a green card-holding Palestinian activist who took part in the Gaza protests at Columbia University.

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.

A federal court petition demanding Mahmoud Khalil’s release provides details of the Columbia University activist’s arrest. Trump says more arrests are to come.

A prominent Palestinian activist who helped lead last spring’s protests at Columbia University is facing deportation following his arrest by federal immigration agents over the weekend.

President Trump warned that the arrest of prominent Palestinian activist Mahmoud Khalil by federal immigration authorities is the first "of many to come."