Mahmoud Khalil, 30, who graduated in December from Columbia with a master’s degree from its School of International and Public Affairs, was arrested by immigration officers in New York on Saturday and sent to a detention center in Louisiana. Mr. Khalil, who has Palestinian heritage, holds a green card and is married to an American citizen who is eight months pregnant.
Mr. Khalil, who was born and raised in Syria, became a lawful permanent resident in 2024 after having entered the United States on a student visa around December 2022 to pursue a master’s at Columbia, his lawyers said.