Justice Neil Robertson has reserved his decision on whether Unifor violated a court order against holding up truck traffic into the Co-op refinery.

More than 700 workers of FCL's Regina refinery have been locked out by their employer since Dec. 5, following the breakdown of contract negotiations around pension security.

The union has reached out to the company about going back to the bargaining table but isn't willing to concede on pension security. 

Unifor members will start picketing at Co-op locations across Canada in a boycotting campaign launched in Regina, Sask., on Sunday.

Unifor Local 594 members have been locked out by the Regina Co-op Refinery since Dec. 5.

Unifor members are raising concerns over the safety of the Regina Co-op Refinery after hundreds of employees were locked out by their employer Federated Co-operatives Limited.