SHANGHAI (Reuters) Shanghai authorities are testing mislabeled mutton from a wholesaler a government website said supplies a chain of hot pot restaurants run by U.S. fast food firm Yum Brands Inc, the latest safety scare to taint China’s food industry. Acting on a tip, Shanghai food safety inspectors and police raided a wholesale market on Friday and found packages labeled “New Zealand mutton” at one supplier that had no production date or list of ingredients, according to a report on the website of the municipal food safety committee (www.Spaq.Sh.Cn). (agencies)