For the second time in less than two years, Oprah Winfrey's girls-only boarding school in South Africa has been hit with yet another sex scandal.

According to the newspaper Afrikaans, a 15-year-old girl was found guilty of preying on another student and bullying girls to lie to officials investigating the incident. At least six other girls were "caught fondling each other or trying to get other girls to join them in lesbian liaisons," the paper reports.

Reports say a letter sent to one of the suspended girl’s parents read: "You have been found guilty of physical contact of a sexual nature with another pupil on campus, harassment, bullying other girls on campus and of being dishonest by not telling investigators the whole truth.

The Oprah Winfrey Leadership Academy is remaining tight-lipped about the latest sex scandal to hit the school.

We consider this to be a confidential school matter," said Lisa Halliday, Winfrey's spokeswoman in South Africa.

The incident comes nearly two years after the school's matron, Tiny Makopo, was accused of physically and sexually abusing students in October 2007, including one charge relating to an allegation that she kissed a 13-year-old girl and fondled her breasts. Makopo pleaded not guilty and will appear in court in June, according to the New York Daily News.

Winfrey, who is a victim of sexual abuse herself, wept on air when discussing the scandal at the time. In response, she gave out her cell phone number to every girl at the academy and fired the school's headmistress.

It is unknown if any of the girls had called Winfrey to report the most recent incident, according to the Daily News.