EUGENE, Ore. --- It doesn't snow very often on the University of Oregon campus.
The football team challenged fans to a playful snowball fight on Friday afternoon but it somehow turned into a mischievous and dangerous attack.
Some students blocked traffic, swarmed cars and pelted snowballs at drivers in the middle of campus, preventing people from driving away.
Someone in the crowd recorded a couple minutes of video and posted it on YouTube.
By Sunday, university police and the Dean of Students Office were working together to identify and track down the students in the video.