Immigration enforcement agents on Saturday arrested and detained Mahmoud Khalil, a legal U.S. resident and Palestinian activist.

Fourteen members of Congress have signed a letter demanding the release of Columbia University student Mahmoud Khalil, who was detained by ICE last week.

A federal judge has halted the deportation of a Columbia University graduate student who was detained by immigration authorities for his participation in campus protests over the Israel-Hamas war. Judge Jesse Furman of the Southern District of New York issued the order Monday as the government sought to deport Mahmoud Khalil after arresting him outside his apartment over the weekend.