Updated 11/06/10 – 1:00 p.m.

CHICAGO (CBS) — Authorities have given the all clear at the campus of the Illinois Institute of Technology, after the campus was evacuated Saturday morning for a bomb threat.

IIT spokesman Evan Venie told CBS 2 News that an anonymous call came in late Saturday morning and the caller said there might be a suspicious device on campus.

The campus, 3201 S. State St., was evacuated at about 10:30 a.m., but a search turned up nothing and the all clear was given at about 1 p.m.

The caller did not give a location or mention the nature of the device or why it may have been placed there, Venie said.

The school decided to evacuate all campus buildings. Venie was unable to say how many people were evacuated.

Campus police were working with Chicago police to investigate the threat.

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