ROUGH CUT - NO REPORTER NARRATION<br/> <br />These were the scenes when a U.S. university festival erupted into clashes between students and police.<br/> <br />Officers used tear gas to break up the annual event when they said students became unruly.<br/> <br />They said nearly 3, 000 were involved in the disturbance during the annual 'College Fest' celebration near Kent State University in Ohio on Saturday (April 21).<br/> <br />Ohio police told local media at least 30 people had been arrested by Sunday morning.<br/> <br />Students said police arrived in riot gear and had used tear gas and stun grenades to break up the crowd.
