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.

NEW YORK -- 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.

Pro-Palestinian protesters interrupted a History of Modern Israel class at Columbia University on the first day of the spring semester and handed out antisemitic flyers.