It was a night of ire and flurries for drivers navigating Quebec's autoroutes Wednesday.

According to Transport Quebec, several pileups stalled traffic circulation as a blizzard swept over the southern part of the province. 

The Sureté du Quebec said at least 50 vehicles, including cargo trucks, collided and crashed on Highway 20 Westbound near Mont-Saint-Hilaire, where the Arthur Branchaud bridge crosses the Richelieu River.

Police also confirmed that a man, 70, was killed in the multi-vehicle pileup.

A spokesperson for the SQ confirmed at least two individuals were seriously injured, and several others were treated for minor injuries. 

Joyce Kemp, spokesperson for the SQ, could not pinpoint a cause of the multi-vehicle pileup, but it was snowing heavily and visibility was poor when the crash happened around 1 p.m.

Police closed all westbound lanes shortly afterward. Hours later, highways started to re-open to circulation -- but drivers were urged to be cautious.

Drivers were told to detour via Grande Allée and Route 116 through Mont Saint Hilaire and Beloeil.

In the Eastern Townships, approximately 30 cars stalled on Highway 10 West at Marieville.

Two 53-foot semi trucks collided at around 4 p.m., resulting in a temporary closure of the highway. No injuries were reported. 

Highway 30 closed temporarily in both directions in the St-Constant area after two trucks collided on the highway, then jackknifed at approximately 1:30 p.m.

Several other vehicles were implicated in the collision, though no major injuries were reported.

One person was hospitalized for shock.