Department of Homeland Security Secretary Alejandro Mayorkas appeared on multiple news shows over the weekend to say the U.S. border is effectively closed.

DHS Secretary Alejandro Mayorkas: “The border is closed. We are expelling families. We are expelling single adults. And we’ve made a decision that we will not expel young, vulnerable children.”

Over 15,000 unaccompanied migrant children are now in U.S. custody as the number of asylum seekers at the southern border shows no sign of slowing down. Over 5,000 of those are being held in Customs and Border Protection jails. Axios reports over 800 children have been jailed for over 10 days — more than a fourfold increase over the past week.