U.S. Immigration and Customs Enforcement agents launched “enhanced targeted operations” in the Dallas-Fort Worth area on Sunday, a spokesperson said, signaling an escalation ordered by President Donald Trump as part of his efforts to tighten immigration enforcement.

U.S Immigration and Customs Enforcement said it arrested at least 84 people Sunday in what the agency describes as a “targeted operation” meaning agents were looking for specific undocumented people with criminal backgrounds.

CBS News has learned that the Denver metro area is among the next targets for the stepped-up immigration arrest operations that U.S. Immigration and Customs Enforcement has been conducting under the Trump administration.

U.S. Immigration and Customs Enforcement raids have begun in New York City as the Trump administration pushes for an increase in arrests of undocumented people across the United States. On Tuesday, Department of Homeland Security Secretary Kristi Noem was in New York City to oversee ICE enforcement operations.