Colombia’s president is calling on his compatriots working without legal status in the United States to leave their jobs and return home as soon as possible.

The Colombian woman said the U.S. is no longer promptly releasing migrants who apply for asylum, a departure from previous practices.

Exhausted and grimy after days of detention in the U.S., migrants began arriving Tuesday at their homeland’s capital aboard Colombian government jets—part of what the Trump administration calls America’s largest-ever mass deportation.