Memorial services were held Saturday for four of the six Saskatchewan teens who died after their car collided with a tanker truck.

A service for Aimie Hurley, 14, McKenzie Moan, 14 and Naomi Salas-Schafer, 13, was held in Lloyminster, Sask., Saturday morning, and a separate service was held later in the day for 16-year-old Jayden Boettcher.

On Friday, a funeral for 15-year-old Tarren Attfield took place in Lashburn Sask., a town near Lloydminster, and 17-year-old Kristopher Tavener will be remembered at a service scheduled for Tuesday in Lashburn.

The six teens, all between the ages of 13 and 17, were travelling in a small two-door car when they collided with a tanker truck carrying crude oil on a rural road last Saturday.

The crash took place shortly after 4 a.m., about six kilometres south of Lloydminster, which straddles the Alberta and Saskatchewan border.

When police arrived to scene, the tanker truck was on its roof and the car was completely submerged in a nearby slough, hidden out of sight.

Police said the driver of the truck was trapped inside the vehicle for about an hour before he was freed and rushed to hospital.

Five of the teens were pronounced dead at the scene, while one was rushed to hospital, where he was pronounced dead.

Saskatchewan RCMP said earlier this week it will take at least three months to complete an investigation into the fatal crash.

Police have yet to determine who was driving the car at the time of the accident and whether that teen had a driver’s license.

Toxicology tests were ordered to determine if the teens had been drinking.