Two men who were working to dig out a car on the Trans-Canada Highway were killed Friday afternoon when they were struck by a semi-trailer truck.

RCMP said the accident took place about 30 kilometres west of  Regina near the community of Belle Plaine on roads they described as "extremely icy and slippery." 

RCMP said the tragedy began when a vehicle slid off the road and entered deep snow in the centre divider.

Its owner and a passerby were digging the car out when an eastbound semi-trailer, which had slowed down as it approached the scene, skidded and slid into the divider, striking the two men and killing them, RCMP said. 

The names of the deceased — a Moose Jaw man, 27, and a Regina man, 48 —  were withheld while police worked to notify family members. The accident is under investigation.