A San Francisco college was placed on lockdown for about 45 minutes Monday afternoon after a cardboard cutout of a gun was mistaken for the real thing, according to a local CBS affiliate.
The station reports the prop was part of sociology of criminology class project. Students were asked to dress up as criminals, and one student wore a ski mask and carried a cardboard cutout of a gun.
Another student noticed the cutout, panicked and called police to report a person with a gun.
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