The US Supreme Court has allowed Texas to arrest and jail migrants, as part of the state’s new tough immigration law.

Under the law, known as S-B-4, local and state police can arrest and prosecute those suspected of illegally crossing the Mexican border.

The Biden administration has called the law unconstitutional.

The decision comes a day after it was blocked by the same court while emergency appeals played out.

The law is among the toughest immigration measures taken by any US state in recent memory.

Texas Attorney General, Ken Paxton, hailed the decision as a huge win against the Biden administration and the American Civil Liberties Union, ACLU which challenged the law in court.

The ACLU, for its part, vowed that it won’t back down until what it calls an extreme anti-immigrant law is struck down for good.