The Trump administration has stopped routinely separating migrant families at the border, but is now struggling with the task of reuniting more than 2,500 children it already took from their parents.

Some children younger than 5 have been returned to their parents, but many minors remain in government custody . In addition, the ACLU is pressing a lawsuit against federal officials over the governments reunification efforts, and a judge has imposed a July 26 deadline for all the children to be returned to their parents.

Heres where things stand for separated families.

What is the family separation policy?

The Trump administration began pressing a policy earlier this year of separating families caught crossing the border illegally, taking children into government custody while their parents were prosecuted. The move was part of the administrations zero tolerance crackdown on illegal immigratio n .

More than 2,500 children were taken from their parents. After widespread condemnation of the policy, President Donald Trump on June 20 issued an executive order he claimed would stop the separations, calling instead for a massive expansion of the detention of entire families.

Costs for the governments efforts are mounting. In the last two months, the Department of Health and Human Services, which is responsible for sheltering the children, has spent at least $40 million on the care and reunification of migrant children who were separated from their families at the border, according to Politico.

How many children have been reunited with their families?

Federal Judge Dana Sabraw ordered the government on June 27 to reunite the separated children, prioritizing those under age 5. He gave the government a deadline of July 10 for reuniting children under 5 with their parents, and July 26 for older kids.

As of July 12 two days after the judges deadline officials said they had reunited 58 kids younger than 5 . Of the remaining children under age 5 who are still in custody, 12 childrens parents had already been deported and 34 children are ineligible for reunification because their parent was found to be unsafe, in criminal custody or not actually the parent, according to government officials.

How many children are still separated from their parents?

The total number of children between ages 5 and 17 who were likely separated and are still in government custody is 2,551, an HHS official said in court on Monday. The government has been unable to identify a parent for 71 of those children. The children are in 106 locations overseen by HHS nationwide, and their parents are in Homeland Securitys immigration jails.

The government said meeting Sabraws July 26 deadline to reunite the children and parents will be a challenge. Officials argued that speeding up the vetting process before releasing a child to a parent could violate the Trafficking Victims Protection Reauthorization Act, which governs the treatment of unaccompanied alien children.

Reunification can happen quickly and safely, Sabraw said. Those two things are not mutually exclusive. HHS is responsible for this and can do it well.

Sabraw also ordered the government to temporarily stop deporting families for at least a week after they are reunited.