CHICAGO -- The U.S. Secret Service said its agents visited a Chicago elementary school Friday while investigating a threat, hours after school officials mistakenly claimed that U.S. Immigration and Customs Enforcement agents had come to the building.

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.

School officials said ICE agents tried to enter Hamline Elementary Friday morning, spurring panic. The Secret Service later claimed responsibility.

Officials with Chicago Public Schools claimed U.S. Immigration and Customs Enforcement agents were seen at Hamline Elementary School. The Secret Service said special agents were investigating a threat.

Fearing federal agents asking to search a Chicago elementary school Friday morning were from Immigration and Customs Enforcement, school officials denied them entry. But it turned out they were US Secret Service agents pursuing an investigation.

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

The U.S. Secret Service told the I-Team they approached a South Side school Friday. Chicago Public Schools officials had initially said the agents were from U.S. Immigration and Customs Enforcement.

After Chicago Public Schools (CPS) initially claimed that U.S. Immigration and Customs Enforcement (ICE) agents visited a South Side elementary school Friday morning, it was later confirmed that this was not the case.

The Trump administration intensified efforts to crack down on illegal immigration, making U.S. Immigration and Customs Enforcement (ICE) a central focus.

The U.S. Secret Service says their agents came to the school to investigate a threat, not to enforce immigration laws. Their arrival spread fear in a community on high alert.

Despite earlier reports that ICE agents tried to enter a Chicago elementary school Friday, the agency says it wasn't them. So what exactly happened?