It happened in Middlesex County at 11:15 p.m. on Wednesday, Aug. 10, according to Connecticut State Police.
A vehicle was southbound in the Town of Middlefield on Miller Road near the intersection with Main Street when, for unknown reasons, it left the roadway and struck a tree, police said.
The vehicle caught fire, and the Middlefield Fire Department responded and extinguished the blaze, according to the report.
Police said the driver was found dead inside of the vehicle.
State Police said due to the condition of the driver and the vehicle, police could not confirm the driver's identity or the make and model of the vehicle.
Troopers are working with the Office of Chief Medical Examiner to determine the driver's identity, police said.
Police asked anyone with information about the crash to call 860-399-2100.
This is a developing story. Check back to Daily Voice for upates.
Click here to follow Daily Voice Windham-Willimantic and receive free news updates.