The Trump administration said Monday that the University of Pennsylvania violated laws guaranteeing women equal opportunities in athletics by letting a transgender swimmer compete on the school's women's team and into team facilities.

Penn has maintained that it was in full compliance with all National Collegiate Athletic Association rules and eligibility at the time it allowed Thomas to compete and remains so.

The Trump administration said Monday that the University of Pennsylvania violated Title IX by letting a transgender swimmer compete on the school’s women’s team and enter into women’s facilities. It gave Penn 10 days to voluntarily resolve the violations,