Civil rights organizations including the American Civil Liberties Union filed a lawsuit Monday seeking to block implementation of a Texas law that would authorize local police officers to arrest migrants who cross the southern border illegally.

The legal challenge targets legislation that would expand arrest powers beyond federal immigration enforcement agencies to include state and local law enforcement officers. The law represents part of Texas's broader efforts to address immigration enforcement along its border with Mexico.

The lawsuit argues that immigration enforcement falls under federal jurisdiction and that the state law overrides federal authority in this area. Civil rights groups contend that the legislation could lead to violations of constitutional protections and civil rights.

Texas officials have defended the measure as necessary to address what they describe as inadequate federal border security. The state has implemented various border security initiatives in recent years, including physical barriers and increased law enforcement presence.

The legal challenge will likely face review in federal court, where judges will determine whether the state law conflicts with federal immigration authority. The case adds to ongoing litigation surrounding state versus federal roles in immigration enforcement.

The outcome could set precedent for other states considering similar legislation and may influence the broader debate over immigration policy and enforcement responsibilities.