Fifteen University of Michigan students have been arrested for breaking into Michigan Stadium.
Campus police said they were called to the Big House just after 3 a.m. Friday on reports of people had climbed inside.
All of the students were male and police said it was a stunt for a fraternity pledging activity.
Police haven't released the name of the fraternity involved.
Friday's incident comes just two days after campus police busted a group of students who had cut down a pine tree as part of a fraternity activity.