Norwich Public Utilities said a mechanical issue at a substation in town caused a significant power outage that affected thousands of people.
Crews said the power outage impacted a large number of customers. The utility company said 11,000 customers were impacted and power was restored within two hours.
Power was restored around 8 p.m. Crews said they're conducting a thorough investigation to find out exactly what happened within the substation and to see what can be done to prevent this type of thing from happening again.
Get top local stories in Connecticut delivered to you every morning. Sign up for NBC Connecticut's News Headlines newsletter.
For a map of power outages in the area, click here.
Sign up for our Breaking newsletter to get the most urgent news stories in your inbox.