The police station at Northern Illinois University was locked down on Wednesday morning as special agents from the FBI and state police served a search warrant there.
The FBI is the lead investigating agency in the incident, and is operating in conjunction with the U.S. Department of Education's Office of the Inspector General, and the Housing and Urban Development's Office of Inspector General, officials said. The search began about 8 a.m., authorities said.
Illinois State Police were on the scene with a mobile command unit, and law enforcement officers were seen taking items out of the building and into the vehicle.
The building includes the information technology services department and the health services department, but NIU spokesman Paul Palian said the Department of Police and Public Safety was the only target of the search, as far as he knew. The university is cooperating fully with the matter.
An FBI press release said the action was not in response to any public safety concerns, and although no one is being allowed into the building, the NIU Police would continue to function as normal.
"No arrests have been made nor charges filed with respect to the investigation," the release said. "Due to the ongoing nature of the matter, no additional information is available at this time."
FBI Chicago Media Coordinator Joan Hyde said the FBI typically did not announce searches but decided to issue a news release about this one around 8:15 a.m. to avoid passersby noticing the police presence and worrying about a large emergency.