By Dana Kozlov

ELMHURST, Ill. (CBS) — Elmhurst University was placed on lockdown for hours late Wednesday because of a report of a person with a gun, but no suspect was ultimately located.

Elmhurst police said at 3:30 p.m., they responded to a single report of a man with a gun at the university, main street address 190 Prospect Ave. in the west suburb.

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The university reported on its website that a person with a gun was found around 3:35 p.m. near the Dinkmeyer Hall dormitory. Half an hour later, the person was reported near Niebuhr Hall dormitory.

Those on campus were told to seek shelter in a locked room and remain in place until an all-clear was given. Around 6:05 p.m., the all-clear was issued and the university said normal campus activities could resume.

As CBS 2 Political Investigator Dana Kozlov reported, all the roads and entrances leading into the campus were blocked off by Elmhurst police cars with lights on while the lockdown was in place.

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While the first reports about the person with the gun came in around 3:30 p.m., one student told Kozlov that he did not get official notice from the university until around 4:50 p.m., when he got an email from a teacher saying class was definitely canceled.

“So right now, I got an email for a teacher saying, ‘Stay put,’ till they get the all-clear,” said student Tevin Franklin. “He doesn’t know what’s going on right now either. He just said he’s going to lock down the classroom.”

Before the all-clear, Kozlov reported she was seeing police officers walking through the buildings, presumably searching them.

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Police said no suspect was located after the systematic search, and the lockdown ended.