Trump celebrated the arrest of Mahmoud Kalil, a former student at Columbia University, in a post to Truth Social

Mahmoud Khalil, recent Columbia University graduate and key figure in pro-Palestine encampment last April, was told his green card was revoked - Anadolu Ajansı

Mahmoud Khalil, who recently completed a graduate program at Columbia, has legal permanent residency, his lawyer said.

Mahmoud Khalil's attorney says he was detained by immigration officers who claimed his student visa was revoked, despite him not being on one. His whereabouts remain unknown.

ICE agents arrested Palestinian activist Mahmoud Khalil -- a leader in Columbia University's encampment movement -- on Saturday night, said attorney Amy Greer.