Columbia University says it is boosting security after an incident on campus involving protesters. Earlier this week, the university said in a statement a class on "The History of Modern Israel" was disrupted Tuesday by a group of students who handed out fliers showing violent imagery.

“Four student activists, donning keffiyehs, marched into the class, ‘History of Modern Israel,’ filming themselves as they recited a script, passed out propaganda, and harassed students, most of whom are Jewish, according to a student in the class,” The Washington Free Beacon reported.

We want to be absolutely clear that any act of antisemitism … against members of our community is unacceptable and will not be tolerated’

The Ivy League university, an epicenter for protests last year, says it is “expediting” its investigation into a group who disrupted a class on Israeli history Tuesday.