Council offices in Newark have been evacuated and people are being urged to stay away from the area.
It is not yet known why the building has been evacuated but Nottinghamshire Police and Nottinghamshire Fire and Rescue are aware of the incident.
The council building, Castle House, is located in Great North Road, Newark.
A statement on the Newark and Sherwood District Council’s social media channels said: “Castle House in Newark has been evacuated and will be out of action for at least an hour. We are liaising with police and fire.
“Please stay away from the area until further updates are available.
“Our apologies for the inconvenience.”
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