The Trump administration has selected Tornillo, Texas, for the construction of tents to house the overflow of immigrant children, many of whom have been separated from their parents under a new “zero tolerance” policy, according to three sources familiar with the decision.

The Department of Health and Human Services (HHS) will erect a “tent city,” full of large tents whose walls touch the ground, and is estimated to hold approximately 450 beds for children, say the sources.

It will not be the first time the U.S. government has erected tent cities to house immigrants. U.S. Customs and Border Protection used tents to house an influx of immigrants in 2014 and at the end of the Obama administration. But now the overflow of a particular immigrant population — in this case, children — is a government-created problem.