The university announcement comes in the midst of a slew of reported sexual assaults on campus.
Members of the Greek Gamma Alpha chapter, who tout themselves with the slogan of “the better man,” were accused of waving sex toys and throwing eggs at anti-rape demonstrators during the Take Back the Night march on November 21.
Students were also accused of hazing and alcohol misconduct issues.
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According to one protester advocating to stop violence against women, people at parties shouted obscenities, threw eggs at the marchers and waived inappropriate objects as they passed.
The university’s Greek community voluntarily suspended all social activities after the incident.
The Delta Sigma Phi national office released a statement Monday, saying:
"It recently became clear that certain members of Gamma Alpha Chapter have not maintained the integrity that our members deserve and that our history demands. A series of incidents highlighted behavior inconsistent with the high standards that have been synonymous with the Delta Sigma Phi Fraternity at San Diego State University. After learning of widespread member misconduct issues, the National Fraternity determined it was not in the best interest of Delta Sigma Phi to continue operating Gamma Alpha Chapter. The Fraternity cannot, and will not, tolerate blatant disregard toward our policies and standards for members and chapters.”
On Monday, the SDSU Greek community announced new sexual assault awareness training for all fraternity and sorority members, including online courses, presentations and sexual assault prevention events, including Take Back the Night.
Delta Sigma Phi has been told it may return to SDSU after the fall of 2016 if members adhere to these policies.
Since the start of the semester, 13 sexual assaults have been reported at San Diego State. Of those 13, seven of the alleged incidents happened at locations classified as a fraternity, according to data from the university.