FILE - This undated photo released by U.S. Department of Health and Human Services shows inside of the HHS' facility at Tornillo, Texas. On Friday, June 28, 2019, border officials were expected to unveil the newest outdoor facility meant to detain immigrant children and families who cross the U.S. border near Yuma, Ariz. Over the last two years, that area has seen a tremendous spike in the number of families and children who travel unaccompanied. (U.S. Department of Health and Human Services via AP, File)

FILE - This undated photo released by U.S. Department of Health and Human Services shows inside of the HHS' facility at Tornillo, Texas. On Friday, June 28, 2019, border officials were expected to unveil the newest outdoor facility meant to detain immigrant children and families who cross the U.S. border near Yuma, Ariz. Over the last two years, that area has seen a tremendous spike in the number of families and children who travel unaccompanied. (U.S. Department of Health and Human Services via AP, File)

YUMA, Ariz. (AP) — Border officials were expected to unveil the newest outdoor facility meant to detain immigrant children and families who cross the U.S. border near Yuma, Arizona.

The number of families and children who travel unaccompanied spiked tremendously over the last two years. Border Patrol’s 400-person capacity building in Yuma is regularly overcrowded as agents struggle to process the large number of people. Most are Central American and many are asylum seekers.

Nearly 11,000 families and 6,000 unaccompanied kids have crossed the Yuma sector since October, making it the third-busiest area in the Southwest.

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Construction on the new 500-person tent facility began about two weeks ago.

Journalists are scheduled to tour it Friday morning, before anyone is placed there. The Border Patrol says it will start placing families there on Friday night.