Peel police confirmed that detail to CTV News Toronto Monday morning, adding that those killed were 16, 17, and 19 years old.
Emergency crews were called to Elmvale Avenue and Conestoga Drive shortly after 2 a.m. for a single-vehicle collision.
Police said a vehicle crashed into a tree in the area and burst into flames. When the fire was extinguished, three occupants in the vehicle were located and pronounced dead at the scene.
Prior to the collision, police believe the white Honda Civic was travelling southbound and left the road for an unknown reason.
The front-end of the vehicle sustained significant damage following impact and a large amount of debris could be seen scattered around the crash site.
Nearby residents who spoke to CP24 at the scene said they were awoken by a loud bang in the middle of the night.
People who identified themselves as family and friends of the victims placed flowers and a teddy bear at the scene in the hours that followed the crash.
An investigation led by Peel police’s major collision bureau is underway.
The names of the deceased have not been released by police.
With files from CP24’s Kerrisa Wilson
