Nearly 100 people were arrested after protesters gathered at Trump Tower in Manhattan Thursday to denounce the arrest of Mahmoud Khalil, a Palestinian activist detained by ICE over his involvement with pro-Palestinian demonstrations at Columbia University.

Police, staged inside and outside the Fifth Avenue building before the demonstration, warned protesters to leave or face arrest.

Some protesters held signs that read "Fight Nazis not students," "Free Mahmoud free Palestine" and "You can’t deport a movement."