The squabble began at 9:30 p.m. in the town of Isla Vista after a UC Santa Barbara police ******r was hit on the head at the Deltopia party, attended by approximately 15,000 people, with a backpack containing several large bottles of *******, according to a statement on the Santa Barbara County Sheriff's website. ******rs arrested 18 people during the disturbance, while nearly 30 were taken to the hospital.