'Khalil was arrested without warrant'

Lawyers for

Columbia University

activist Mahmoud

Khalil

say they will argue that his deportation should be blocked after the Trump administration acknowledged he was

arrested

without a warrant. Govt said in a court filing Thursday

ICE

agents didn't have a warrant when they took Khalil, who led anti-Israel protests, into custody in March outside a university-owned apartment in New York. Justice department lawyers argued the "warrantless" arrest was justified because ICE agents who approached Khalil on the street thought he might try to flee after refusing to cooperate with them.