A New York Times examination of more than 100 videos from clashes at the University of California, Los Angeles, found that violence ebbed and flowed for nearly five hours, mostly with little or no police intervention. The violence had been instigated by dozens of people who are seen in videos counterprotesting the encampment.

The videos showed counterprotesters attacking students in the pro-Palestinian encampment for several hours, including beating them with sticks, using chemical sprays and launching fireworks as weapons. As of Friday, no arrests had been made in connection with the attack.