A new government memo says the Trump administration waived background checks for all staff working at the nation's largest detention camp.

The memo says the former director of the federal Office of Refugee Resettlement personally signed off on sidestepping requirements for checks on child abuse and neglect.

None of the 2,100 staff has gone through FBI fingerprint checks either.

TORNILLO, Texas (AP) — A new government watchdog memo says the Trump administration waived rigorous background checks for all staff working at the nation's largest detention camp for migrant children.

The memo, obtained exclusively by The Associated Press, says the former director of the federal Office of Refugee Resettlement personally signed off on sidestepping requirements for child abuse and neglect checks at the tent city in Tornillo, Texas.

Children and workers are seen at a tent encampment recently built near the Tornillo Port of Entry on June 19, 2018 in Tornillo, Texas. Joe Raedle/Getty Images None of the 2,100 staff has gone through FBI fingerprint checks either, but the Tornillo contractor says staff are vetted in other ways.

The Department of Health and Human Services' Office of Inspector General memo confirms AP's reporting that teens held at Tornillo are receiving inadequate mental health care.

A department spokesman did not immediately provide comment Tuesday.

Read more: A day in the life of a migrant mother and her 2 children traveling in the caravan marching through Mexico

The Trump administration announced in June that it would open a temporary shelter for up to 360 migrant children in an isolated corner of the Texas desert.

Tornillo has since expanded into a detention camp holding thousands of teenagers — and it shows every sign of becoming more permanent.

By Monday, over 2,300 largely Central American boys and girls between the ages of 13 and 17 were sleeping inside the highly guarded facility in canvas tents.

An Associated Press investigation has found that federal plans to close Tornillo by New Years' Eve may be nearly impossible to meet.

A contract obtained by AP shows the project could continue into 2020 and planned closures have already been extended three times since this summer.