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Four people, ranging in age from 15 to 19 years old, killed in Puslinch, Ont. crash

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What caused a crash that killed four people and left two others with life-threatening injuries? CTV's Hannah Schmidt reports.

New details have been shared about a fatal collision in Puslinch, Ont.

Ontario Provincial Police said a vehicle hit a guard rail along Watson Road South and crashed into the ravine below. It happened just before a bend in the road, between Maltby Road East and Wellington Road 34, around 1:35 a.m. Saturday.

puslinch guelph watson road wellington maltby crash collision fatal Damaged guard rail along Watson Road South in Puslinch, Ont. on Oct. 31, 2026. (Hannah Schmidt/CTV News)

There were six occupants in the vehicle at that time.

Four of them were pronounced dead at the scene.

At a press conference on Sunday morning, Ontario Provincial Police said a 19-year-old man from Mississauga, 19-year-old man from Brampton, 17-year-old girl from Mississauga and 15-year-old girl from Milton were killed.

Another 17-year-old girl remains in hospital with life-altering injuries, while a 15-year-old girl has non-life-threatening injuries. Both are from Mississauga.

puslinch fatal crash collision opp maltby Sgt. Ed Sanchuk (centre) shares an update on a fatal crash in Puslinch, Ont., along with Wellington County OPP Insp. Karen Medeiros (left) and West Region OPP Supt. Wendy Burrow (right), at a press conference on Nov. 1, 2026. (Hannah Schmidt/CTV News)

Inspector Karen Medeiros with Wellington County OPP called it an “unimaginable loss.”

“Four young people have lost their lives, in a matter of moments,” she said. “Families have been forever changed, and an entire community is searching for answers. Our responsibility is to ensure those answers are based on evidence, facts and a thorough investigation. That work will continue in the days and weeks ahead.”

puslinch guelph watson road wellington maltby crash collision fatal The scene of a fatal crash on Watson Road South in Puslinch, Ont. on Oct. 31, 2026. (Hannah Schmidt/CTV News)

One factor they have to consider is the number of passengers inside the vehicle.

“I don’t believe that this vehicle had enough seatbelts for the amount of occupants who were in the vehicle at that time,” said Insp. Medeiros.

“At this stage of the investigation, it’s too early to determine exactly what caused the collision,” she told reporters. “Investigators continue to gather information and carefully assess all the available evidence, including information related to speed and seat belt use as they work to establish the circumstances surrounding the collision.”

watson maltby wellington puslinch guelph fatal crash collision A road closed sign at Watson Road South and Maltby Road in Puslinch, Ont. on Oct. 31, 2026. (Hannah Schmidt/CTV News)

OPP asked anyone who was in the area around 1:30 a.m., especially those with security or dash cam video, to contact the Wellington County detachment at 1-888-310-1122.

“Even information that might seem insignificant could prove valuable to investigators as they piece together the events that led up to this tragedy,” Insp. Medeiros said.

puslinch guelph watson road wellington maltby crash collision fatal Damaged guard rail along Watson Road South in Puslinch, Ont. on Oct. 31, 2026. (Hannah Schmidt/CTV News)

Maltby Road East remained closed on Sunday. OPP said that was due to the damaged guard rail at the crash site.

“We want to ensure the safety of other motorists on the roadway,” Insp. Medeiros explained.