As of Tuesday, 4,228 unaccompanied children were in the care of Customs and Border Protection, an agency generally unwilling to care for children for long periods of time, and 16,045 children were in the care of the Department of Health and Human Services, the one Shelter oversees network.

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The latest numbers indicate progress as the administration seeks to reduce overcrowding in Border Patrol facilities and refer children to HHS.

But the encounters of children who cross the border between the United States and Mexico alone are still high. 747 unaccompanied children crossed the border on Tuesday.

“What we do every day is, ‘OK, where are we? How many people came in today? Where are they going? How many beds do we have? What are any blocks in the system to remove children from the system to keep them with a White House official told CNN on Wednesday. “There are a million little things that help increase that throughput of children.”

Still, the administration must continue to expand bed capacity and drastically shorten the time it takes to release unaccompanied migrant children to godparents such as parents or other relatives in the U.S. to avoid backlogs in Border Patrol facilities in the coming months, according to internal government documents published by CNN were obtained.