A community member sent a video showing the moments Acero Schools said an adult was detained by U.S. Immigration and Customs Enforcement officers.

Two students were with the adult outside the Southwest Side school Wednesday morning, officials said. "It is really terrifying for families and traumatizing for students," one observer said.

Administrators said they escorted two students into the building away from the incident. The federal agents did not enter the building, charter officials said. Federal immigration authorities did not confirm the action.