US President Donald Trump on Wednesday backed down and abandoned his policy of separating immigrant children from their parents on the US-Mexico border, after images of youngsters in cages sparked outrage at home and abroad.

Trump signed an executive order requiring immigrant families be detained together when they are caught entering the country illegally for as long as their criminal proceedings take.

While that may end a policy that drew a rebuke from Pope Francis and everyone else from human rights advocates to business leaders, it may also mean immigrant children remain in custody indefinitely.

The Trump administration still faces legal challenges because of a court order that put a 20-day cap on how long immigration authorities may detain minors, and trigger fresh criticism of Trump’s hardline immigration policies, which were central to his 2016 election campaign and now his presidency.

Administration officials were unable to clarify whether family separations would end immediately or when and how families now separated would be reunited.

“It is still very early and we are awaiting further guidance on the matter,” Brian Marriott, a spokesman for the Health and Human Services Department’s Administration for Children and Families. “Reunification is always the ultimate goal of those entrusted with the care of” unaccompanied children and “the administration is working towards that” for those in custody.