CHICAGO (CBS) — Officials briefly placed Glenbard North and two other schools on lock down on Friday morning because they believed a person in the area could be a threat to students.

The lock down was lifted by 10:10 a.m.

There was no immediate danger inside the school, officials said.

It all started around 7:15 a.m. when Carol Stream police said someone called police to report a person with a gun was headed to the school.

Americana School and Glenside Junior High in Glendale Heights also put their schools on a lock down due to the reported threat.

Police have since determined the call was a hoax made a 50-year-old man from Glendale Heights.

That man has been taken into custody and is being questioned by police.

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