U.S. District Judge Brian Murphy ruled Wednesday that the Trump administration's policy for deporting migrants to third countries is unlawful, rejecting the administration's request to lift a block on the Department of Homeland Security policy.

The policy in question allows federal immigration officials to swiftly deport migrants to countries other than their country of origin. The Trump administration had sought to implement this third-country removal procedure as part of its broader immigration enforcement strategy.

Judge Murphy, presiding in Boston federal court, determined that the policy violates both federal immigration law and constitutional requirements. The ruling maintains existing restrictions that had previously blocked implementation of the deportation policy.

The Department of Homeland Security had developed the policy to expedite removal proceedings for certain migrants, but faced legal challenges questioning its compliance with established immigration procedures and due process protections.

The Wednesday court order represents another legal setback for Trump administration immigration policies, which have faced numerous court challenges since implementation. The ruling affects how federal officials can proceed with deportation cases involving potential removal to third countries rather than migrants' home nations.