Guelph Police Service says there were no firearms found at a home in the Eramosa Road-Meyer Drive area.
They received a call about someone going around with a firearm Tuesday afternoon around 2:30.
Police closed Eramosa Road in both directions and cordoned off a large area as a precaution.
One man was seen leaving the residence and was immediately detained.
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An investigation revealed no firearms and the man was later released without charges.
The road was reopened to traffic about an hour later.