Border czar Tom Homan told NBC News that several people with criminal convictions were apprehended in Chicago.

The Trump administration launched an immigration enforcement blitz in Chicago on Sunday that includes several federal agencies that have been granted additional authorities to arrest undocumented immigrants in the US,

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.