U.S. fast food chains McDonald’s Corp and KFC-parent Yum Brands Inc apologized to Chinese consumers on Monday and said they will stop using a Shanghai meat supplier after Chinese regulators shut the firm down over food safety concerns. A watchdog closed a Chinese branch of privately held U.S.-based food supplier OSI Group LLC and seized meat products suspected of being beyond their expiration date, according to a statement on Monday from the Shanghai Municipal Food and Drug Administration. OSI products were sold to clients including Yum’s KFC and Pizza Hut chains and McDonald’s.