Police say two Calgary men, both 18, died overnight when a speeding vehicle they were in went out of control and struck a pole near an intersection.
Earlier in the night, a woman died when a car she was driving slammed into a cable barrier on the city's busy Deerfoot Trail.
Investigators believe the victim may have had a pre-existing medical condition.
A third overnight accident saw a driver suffer serious injuries after being ejected from a speeding car that went out of control, struck two other vehicles and hit a light standard.
The fourth fatality occurred Tuesday afternoon when a motorcyclist in his 40s died in a collision with a cube van in an industrial park.
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