U.S. Department of Homeland Security Secretary Jeh Johnson announced the arrests in a statement released this week, saying they are part of "Operation Border Guardian." The focus, he said, is on people who came here illegally as unaccompanied children after Jan. 1 of 2014, who are now older than 18, and who have been ordered removed by immigration judges.
Federal immigration authorities could not immediately provide a state-by-state breakdown of where the 336 people were taken into custody. Their arrests follow immigration raids that resulted in the arrest of 121 adults and children in Georgia and elsewhere in January. Of that number, 77 have been deported, according to U.S. Immigration and Customs.