Some Plymouth residents were asked to shelter in place due to an "active police situation" which they say has been contained to one home.
The shelter in place order impacted residents living on or around Prospect Street Ext. in the Terryville section of town.
Others were asked to avoid the area during the police investigation.
Officials said no injuries have been reported.
Get Connecticut local news, weather forecasts and entertainment stories to your inbox. Sign up for NBC Connecticut newsletters.
No additional information was immediately available.