Four people are dead and several others were injured after a crash involving a vehicle that police say was driving the wrong way along Stoney Trail Sunday night.

It happened around 11 p.m. in the northbound lanes of the highway, just south of Glenmore Trail.

According to police, a vehicle was travelling southbound in the northbound lanes when it collided with multiple vehicles.

Emergency Health Services Alberta tells Global News that three vehicles were involved in the collision and that two of the vehicles caught fire. It’s unknown how many people were in the vehicles that caught fire, but paramedics have confirmed that a total of four occupants were declared dead at the scene.

Paramedics say the third vehicle had four people inside who were all taken to hospital. Two adults were transported to Foothills Hospital while two children were taken to Alberta Children’s Hospital. The extent of their injuries is unknown.

The Calgary Police Traffic Unit is investigating.