CHICAGO — Police were called to several libraries in the Chicago area on Tuesday in regard to bomb threats. Police continue to investigate, but officers say none of the threats were substantiated. 

Threats in Aurora

Police in Aurora say officers are investigating reports of bomb threats at three Aurora libraries on Tuesday afternoon. 

Aurora police first notified the public about the threats in a tweet shared around 3 p.m. 

In a follow-up post, officers asked the public to avoid areas near the Santori Public Library in the 100 block of South River Street, areas near the Eola branch library in the 500 block of South Eola Road, and areas near the West branch library in the 200 block of South Constitution Drive, while they evacuated and shut down roadways. Police say each location has since reopened to the public.

Police say the evacuations were ordered at all of the impacted libraries as a precautionary measure, but after authorities conducted searches of all of the targeted buildings, no explosive devices were located.

Police say the incident appears to be a hoax and ask anyone with information about the threats to call the Aurora Police’s Investigations Division at 630-256-5500.

Threats in Evanston

Evanston police are investigating reports of bomb threats at the Evanston Public Library in the 1700 block of Orrington Avenue and the Evanston Public Library Robert Crown Branch in the 1800 block of Main Street.

According to police, the threats came in through an email on Tuesday.

Police first notified the public about the reported threat around 4:30 p.m. 

Evanston officers evacuated both buildings and say the Cook County Sherriff’s Bomb Squad conducted a sweep at the Evanston Public Library and will then send crews to the Robert Crown branch.

Officers say none of the threats have been substantiated. 

Threats in Addison

Police in Addison say officers responded to reports of a bomb threat at Addison Public Library on 4 Friendship Plaza on Tuesday. 

Addison police say the Village and Library campuses were closed to the public while the DuPage County Bomb Squad searched the building.

Police say they have since determined that the threat was unfounded.

Threats in Chicago

Just before 3:30 p.m. on Tuesday, Chicago police were called to the Harold Washington Library in the 400 block of State Street after an employee received an email stating that there was a bomb on campus.

Police say no threats were found after the bomb squad and a K9 unit were called in to conduct security sweeps.

Police say the building was not evacuated and Area 3 detectives are now investigating.

This is a developing story, stay with WGN News for the latest updates.