VANCOUVER -- The B.C. NDP may be running a positive campaign, but the party’s supporters went negative on Monday.

A group called "BC Workers" launched an anti-government radio spot claiming the ruling Liberals “opened the door for mining companies to import cheap labour with no rights and no protection.”

The 30-second ad also claims “politicians should be on the side of B.C. jobs for B.C. workers.”

B.C. labour unions have heavily criticized HD Mining for cancelling a proposed mine in the northern part of the province after accepting applications from 300 Canadians for 200 jobs. Temporary foreign workers were expected to fill the jobs because the Vancouver-based company claimed it needed expertise not available in Canada.

Liberal campaign co-chair, Minister of Energy and Mines Rich Coleman, doesn’t think the new radio ads are truthful and paint an unfair picture of the government.

“I just thought the ad wasn’t true, that’s the sad part,” Coleman said Monday. “The ad didn’t say this was a federal jobs program with regards to finding temporary foreign workers. If you listen to the ad they make it sound like it was a decision of the province of British Columbia, which it wasn’t.”

He added the public should expect more ads that contribute to “muddying people’s minds by different organizations.”

A Liberal-friendly third party, the Concerned Citizens for BC, have been running attack ads against NDP Leader Adrian Dix for weeks.