In Chicago Public Schools, which has received thousands of migrant students in recent years, schools are training staff and families on their rights and grappling with how to convince their communities that schools are safe.

The sheer number of federal agencies involved showed President Donald Trump’s willingness to use federal law enforcement beyond the Department of Homeland Security to carry out his long-promised

Top Trump administration officials visited Chicago on Sunday to witness the start of ramped-up immigration enforcement in the nation’s third-largest city as federal agencies touted arrests around the country.

Targeted immigration enforcement operations by multiple agencies were launched in Chicago Sunday, with top Trump administration officials in the city to oversee the operation. Multiple sources told CBS News Chicago that those held by ICE Sunday have active warrants.

Acting U.S. Deputy Attorney General Emil Bove and Border Czar Tom Homan oversaw immigration enforcement efforts in Chicago on Sunday, as efforts got underway across the country.

Acting Deputy Attorney General Emil Bove, appointed by President Donald Trump, will oversee the efforts of the FBI, DEA, ATF, U.S. Marshall Service, and federal prosecutors.

With two top Trump administration officials in Chicago, federal law enforcement began a “targeted” immigration blitz Sunday, according to a spokesman for U.S. Immigration and Customs Enforcement. The agency did not say how many arrests have taken place so far.