The Supreme Court has refused to allow Florida to enforce an immigration law making it a crime for people who are living in the U.S. illegally to enter the state.

Washington — The Supreme Court on Wednesday left in place a block on a new Florida immigration law that imposes criminal penalties on migrants who are in the U.S. illegally and enter into the state, with the justices declining to pause a lower court decision that stopped it from taking effect while legal proceedings move forward.

The law, enacted this year, made it a crime for unauthorized migrants to enter the state. Challengers say immigration is a federal matter.