The Immigration and Customs Enforcement memo outlines an unprecedented push to target migrant children who crossed the border illegally as unaccompanied minors. It lays out four phases of implementation, beginning with a planning phase on January 27, though it did not provide a start date for enforcement operations.

The administration has ousted the head of the government’s deportation force, according to a new report that said President Trump was upset with the slow pace of deportations.

More than 600,000 immigrant children have crossed the U.S.-Mexico border without a parent or legal guardian since 2019, according to government data.