Four arrested as protesters gather at UC Berkeley for talk by conservative speaker Ben Shapiro

BERKELEY, Calif. - Hundreds of protesters swarmed the University of California, Berkeley, on Thursday evening as conservative writer Ben Shapiro spoke on campus, with law enforcement out in force to prevent a repeat of recent violent clashes between far-left and far-right agitators.

At least four people were arrested for carrying banned weapons. One was also held on suspicion of battery on a police officer. Hundreds of law enforcement officers, many in riot gear, prepared for violence and seized potential weapons. But as