The Trump administration has tracked down 146,000 unaccompanied migrant children who came over the U.S.-Mexico border during the Biden administration and were lost after the government released them to unvetted sponsors, according to senior officials.

Acting Attorney General Todd Blanche and Homeland Security Secretary Markwayne Mullin announced on Thursday a massive increase in the number of children the government had been able to locate since last summer, when just 22,000 had been found.