It happened around 6:30 a.m. in New Haven County in Branford on Thursday, April 28 on Hosley Avenue.
Preliminary findings of the investigation indicate that the operator failed to negotiate a curve in the road while traveling at an excessive speed, Branford Police said.
The crash claimed the lives of all three individuals in the vehicle.
The operator was identified as New Haven County resident Megan Nicole Povilaitis, age 17, of East Haven, Branford Police said.
The passengers, who are siblings have been identified as Middlesex County resident Anthony Dudchik, age 19, of East Haddam, and New Haven County resident Robert Dudchik, age 22, of East Haven.
Connecticut Gov. Ned Lamont posted on Twitter: "Connecticut son and my friend Tom Dudchik lost his two boys, Anthony and Robert, in a car accident. Please keep Tom, Nora, and the greater Dudchik family in your prayers as they deal with this unimaginable loss."
Anyone with any information in reference to the accident is encouraged to call Sgt. Christopher Romanello at 203-481-4241.
Check back to Daily Voice for updates.
Click here to follow Daily Voice New Haven and receive free news updates.