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.

Nearly 100 people were arrested Thursday after staging a sit-in at Trump Tower in New York City, the NYPD said. It started at around 11:30 a.m. Thursday, police said.According to police, roughly 150 people dressed in civilian clothes entered Trump Tower just before noon.

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