The Trump administration has found that the California Department of Education and the state’s high school sports federation violated civil rights law by allowing transgender girls to compete on girls sports teams.

The statement is the latest battle between the Trump administration and some states over the role of transgender women and girls in sports.

California has 10 days to rescind any sports prizes awarded to transgender athletes and ban them from competition, after U.S. Secretary of Education Linda McMahon said that the state Department of Education had violated Title IX by allowing trans athletes to participate on teams that reflect their gender identity.