WASHINGTON (AP) The Supreme Court threw out key provisions of Arizona’s crackdown on illegal immigrants Monday but said a much-debated portion could go forward — that police must check the status of people stopped for various reasons who might appear to be in the U.S. illegally.

The court upheld the “show me your papers” requirement, but even there the justices said the provision could be subject to additional legal challenges. And they removed some teeth by prohibiting officers from arresting people on immigration charges.