Sen. Josh Hawley is demanding answers from the Department of Homeland Security (DHS) on the nearly 300,000 unaccompanied migrant children it 'may have lost track of' within the U.S.

The agency's internal watchdog warned of an 'urgent issue' with how immigration officials have been handling the cases of migrant minors and found that more than 32,000 children had failed to show up for immigration summonses and ICE was 'not able to account' for their locations.

For more than 291,000 unaccompanied immigrant minors, ICE had not bothered to serve them court dates, according to the watchdog, two-thirds of the migrant children who have made their way into the U.S.