Police evacuated the area of West Main and Lincoln streets in New Britain on Wednesday after an issue with an underground electrical line.
Wires were burning underneath the street, fire officials told NBC Connecticut.
The fire came in contact with a flammable mixture that led to two explosions about twenty minutes apart from one another, the fire chief told NBC Connecticut.
Three manhole covers shot up in the area as a result and shook up homes near by.
"That was like really loud," Junita Perez of New Britain said. "I was scared. I just opened a window trying to see what was going on."
Officials from Eversource said the issue with an underground electrical line might have caused a transformer to switch off, which can cause a noise, but they do not believe a transformer actually exploded. Eversource said that no resident lost power because of the incident.
No injuries are reported and part of West Main Street is blocked off.
Check back for updates.