Media outlets report the pre-dawn St. Patrick's Day crowd of more than 1,000 people was climbing on cars, throwing bottles and yelling at police early Sunday morning.

WHIO-TV reports (http://bit.ly/ZD82Ny ) 11 vehicles were damaged, including a police cruiser after the disturbance.

University officials sent an email to students on Sunday banning large, non-university sponsored events in an effort to keep holiday celebrations on campus safe.

A school spokeswoman says about 11,000 students are enrolled at the University of Dayton, and more than 7,000 live on campus.