Penn State University is at the center of controversy again, this time after a photo of students portraying negative, derogatory stereotypes was leaked online.

The picture shows women from the Chi Omega sorority wearing ponchos, sombreros and fake mustaches and holding signs that say "Will mow lawn for weed + beer" and "I don't cut grass, I smoke it."

University officials have put the sorority chapter on probation following the incident, which was being circulated on several social networking sites.

The sorority has apologized for the photo, which was reportedly taken at a Mexican-themed party around Halloween.