REGINA -- Locked out Unifor workers from Regina's Co-op Refinery moved their blockade to Yorkton.

Unifor tweeted the lockout has been extended to the cardlock and bulk fuel station in Yorkton.

In a release, Federated Co-operatives Ltd. called the blockade "illegal", adding it was preventing vehicles from accessing the Legacy Co-op's cardlock and the FCL bulk petroleum plant.

“Unifor continues its use of illegal blockades despite the mediation process being contingent on no illegal activity,” Heather Ryan, FCL Vice-President of Human Resources, said in a news release. “It’s difficult to accept Unifor’s sincerity and commitment to the bargaining process when we see these tactics taking place during the mediation process.”

Mediated talks between the two sides began on Feb. 18, overseen the province's appointed mediator Vince Ready. FCL says more talks are scheduled for early March.

FCL says the RCMP has been notified about the blockade and says it's considering legal options in this incident.