Guelph city hall closed early on Tuesday after the building was placed into lockdown due to a suspicious package being found.
It was expected to return to normal service on Wednesday morning, according to the city.
At around 3 p.m, it tweeted that Guelph police were on scene and the building on Carden Street was on lockdown.
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In another tweet about 45 minutes later, the city said the situation had been resolved, but city hall would remain closed for the day.
A city spokesperson did not provide details about the suspicious package.
City hall has been closed for the most part due to the COVID-19 pandemic, except for the ServiceGuelph which is scheduled to reopen at 8:30 a.m. on Wednesday.