Washington (CNN) Two federal watchdogs have launched investigations into the government's handling of unaccompanied migrant children, including those separated from their parents at the border.

The inspector general for the agency that's housing the thousands of immigrant minors, the Department of Health and Human Services, announced the review on Wednesday, saying it's preparing to devote a lot of resources to reviewing the shelters nationwide.

Also Wednesday, the Government Accountability Office confirmed it would be conducting an investigation into the handling of children separated from their parents.

In a letter responding to a request to do so by New Jersey Rep. Frank Pallone, the GAO said the investigation will examine how HHS and the Department of Homeland Security are tracking immigrant minors in their care and any of their parents also in the system.

The moves come amid intense scrutiny over the administration's handling of its immigration policy that resulted in thousands of families being separated at the border -- and as it struggles to answer questions about how those families will be put back together.