A reported sighting of immigration agents attempting to enter an elementary school on Chicago’s Southwest Side on Friday was actually U.S. Secret Service agents investigating a threat, a federal spokesperson said late Friday afternoon.

U.S. Immigration and Customs 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.

U.S. Immigration and Customs Enforcement agents were seen at a Chicago school Friday afternoon, hours after a Trump administration official confirmed that Illinois was among several states where hundreds of arrests had previously been made.