A second vehicle crash has killed two men and left two others injured, and authorities are urging people to stay away from the area, CBC News has learned.
A man and a woman in their 50s were pronounced dead at the scene at the intersection of 12th Street and Alberta Avenue just before 7:30 a.m.
Sunday, the Alberta Fire Service said.
Two other people in their 20s were taken to hospital with non-life-threatening injuries.
A man who was driving the first vehicle has been charged with careless driving causing death, according to the Alberta RCMP.
Police have identified the deceased as a 35-year-old man and his 46-year old brother.
They had been on a long road trip when they collided.
Investigators said the man who died had been driving a silver or grey Ford Expedition SUV, which was heading south when it crashed into a utility pole and a utility trailer.
A truck, a silver Chevrolet Silverado and a silver Dodge Ram pickup were also involved.
The other victim, who was pronounced dead, was in stable condition, according the Alberta Coroners Service.
They were both from the city of Terrebonne, Ont., about 60 kilometres northwest of Calgary.