LAS VEGAS (AP) - Sin City's largest, most powerful union is picketing the Las Vegas Strip for the first time in a decade.

Culinary Union spokeswoman Yvanna Cancela said labor leaders had reached an impasse with Cosmopolitan of Las Vegas owner Deutsche Bank after 18 months of negotiations to establish a contract. At issue are wages, health care and job security.

The union is calling the one-day protest an informational picket.

The 2-year-old Cosmopolitan is one of just a handful of non-unionized casinos on the Strip. A majority of Cosmopolitan service workers signed cards in 2010 saying they wanted representation.

Cosmopolitan spokeswoman Amy Rossetti said the company understands that workers have a right to picket and that hotel is negotiating in good faith.

The 54,000 member union has not picketed the Strip since 2003.

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