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

In a statement Friday evening, Chicago Public Schools leaders said that after their initial comments went out about ICE agents, they learned the agents were from the Secret Service. The false alarm heightened fears among immigrant communities in the country’s third-largest city.