Denver Public Schools sued the U.S. Department of Homeland Security Wednesday in an effort to block federal immigration agents from making arrests at schools as the Trump administration ramps up mass deportations nationwide.

DPS said the legal action comes in response to a directive revoking long-standing policies regarding immigration enforcement.

The Trump administration’s decision to rescind a decades-old policy that limited immigration raids in protected areas such as schools was challenged in federal court by the Denver Public Schools.

The lawsuit was filed a week after raids on apartment buildings in Denver and Aurora caused fear among students and families.

Denver Public Schools this week is believed to be the first district in the nation to sue the Trump administration over immigration enforcement in schools — but it's likely not the last. The latest: DPS officials have heard from "several" school districts across the country that are interested in joining its lawsuit or pursuing similar action,