In one case, the reason it gave is that both the child held and their parent may be U.S. citizens.

The government listed the case of a child who “cannot be reunified at this time because the parent’s location has been unknown for more than a year,” and “records show the parent and child might be U.S. citizens.”

The filing does not detail the circumstances under which the child was separated from their parent, or why it happened more than a year ago.