After issuing an executive order barring transgender athletes from participating in women’s sports last month, President Trump targeted the state for scrutiny.

A notice sent recently to Maine officials by the U.S. Department of Health and Human Services accused the state of breaking federal law by “allowing male athletes to compete against female athletes in current and future athletic events.

Trump administration officials concluded that Maine violated Title IX for allowing transgender athletes to compete in women’s school sports after launching an investigation into the state in February.