The US government has said it plans to side-step a court agreement that limited detention for immigrant children.
The Department of Homeland Security said it would terminate the agreement, which requires the American government to release immigrant children generally after 20 days in detention.
It would instead adopt regulations that administration officials say will provide for proper care of minors but allow for changes to deter migrants illegally crossing the US-Mexico border.
The Trump administration said it wants to detain families for the length of their immigration court proceedings.
The 1997 case that spawned the agreement will almost certainly land back in court.
US district court Judge Dolly M Ghee has already rejected a request by administration lawyers this year to allow for longer family detention.
Advocates for immigrant families have opposed Donald Trump's detention policies.
