A Penn State University fraternity was suspended for a year Tuesday after police began investigating allegations that members used a private, invitation-only Facebook page to post photos of nude and partly nude women, some apparently asleep or passed out.

A former member of Kappa Delta Rho at the university’s flagship campus in State College tipped police off to the page, telling them in January that it had been used by members to share photos of “unsuspecting victims, drug sales and hazing,” according to a copy of a police warrant obtained by The Associated Press.

The ex-member also provided authorities with printouts from the page.

The fraternity’s national executive director, Joe Rosenberg, told the Penn State chapter in a letter that it would be banned from most activities for the near future and must reorganize.