White House Press Secretary Jen Psaki on Monday admitted that border detention facilities are “not places made for children,” as photos emerge of hundreds being detained there for upward of 10 days.

Psaki made the remark while discussing the growing number of unaccompanied minors crossing the US-Mexico border, who were photographed during a recent congressional visit crowded in indoor enclosures without furniture and wearing foil sheets.

“These photos show what we’ve long been saying, which is that these border patrol facilities are not places made for children,” Psaki said at her daily press briefing.

“They are not places that we want children to be staying for an extended period of time. Our alternative is to send children back on this treacherous journey that is not, in our view, the right choice to make.”

The Biden administration has allowed all unaccompanied children who illegally cross the US-Mexico border to stay at least temporarily in the country.

The number of children is growing at Border Patrol facilities before they can be transferred to centers run by the Department of Health and Human Services, which either releases them to family members or places them with foster families.

“Children, presenting at our border, who are fleeing violence, who are fleeing prosecution, who are fleeing terrible situations is not a crisis,” Psaki said Monday.

“We feel that it is our responsibility to humanely approach this circumstance, and make sure they are treated and put in conditions that are safe.”

As of Saturday, the Border Patrol held about 5,000 unaccompanied minors, out of 15,500 in federal custody, CBS News reported.

Vice President Kamala Harris said Monday during a visit to Jacksonville, Fla., that “we all agree, and [Homeland Security] Secretary Mayorkas said it a number of times this weekend: Let’s get these kids out of CBP custody and get them into HHS custody. We’ve got to treat this issue in a way that is reflective of our values as Americans and do it in a way that is fair and humane and fair. But we have to meet the moment and there’s a lot of work going into that. And we expect to have success, but it’s going to take a lot of work.”

In February, there were 9,297 children detained without parents — about 63 percent more than in January — according to US Customs and Border Protection.  The total number of people apprehended along the Mexican border increased to more than 100,000 in February, up 28 percent from January.

The surge appears to be growing. On Friday morning alone, 1,000 migrants who were either unaccompanied minors or in family units reportedly were detained after crossing the Rio Grande into Texas.