Chicago Public Schools prevented federal officers from from going into an elementary school on Chicago’s Southwest Side Friday and talking to students, according to school officials.

U.S. Immigration and Customs Enforcement agents were seen at a Chicago school Friday afternoon, according to officials with the city's public school district, though a spokesperson for the agency denied such an encounter.

Chicago Public Schools officials claimed Friday that federal agents from U.S. Immigration and Customs Enforcement showed up at an elementary school in the city’s South Side but were blocked by staff from entering.

The agents turned out to be unrelated to immigration, officials said hours later. They were from the Secret Service, investigating a threat.

The Trump administration revoked a policy that prohibited arrests by U.S. Immigration and Customs Enforcement agents at or near schools, places of worship and other places deemed to be "sensitive locations.

According to the school's principal, Natasha Ortega, agents were not allowed entry or permitted to speak with students or staff.

CHICAGO — Top Trump administration officials, including “border czar” Tom Homan and the acting deputy attorney general, 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.

Law enforcement agents attempted entry into a Chicago elementary school Friday morning, but were not allowed inside or permitted to speak to anyone inside, Chicago Public Schools officials said.

Chicago Public Schools officials said in a press conference Friday that Immigration and Customs Enforcement (ICE) agents showed up at an elementary school in the city but were denied entry.  But

ICE, along with several other federal agencies, began what they called "enhanced targeted operations" on Sunday in Chicago.

Top Trump administration officials, including "border czar" Tom Homan and the acting deputy attorney general, visited Chicago on Sunday to witness the start of ramped-up immigration enforcement. ICE spokesman Jeff Carter said the agency "began conducting enhanced targeted operations" Sunday in Chicago but declined other details.