GUANGZHOU, July 21  -- South China's Guangdong Province has sealed suspicious meat supplies from a Shanghai company that allegedly used stale meat in products and mislabeled expiration dates, the local food and drug authorities said on Monday.

Four products from Shanghai Husi Food Co., Ltd were supplied to Pizza Hut outlets in Guangdong, including pork and beef, the provincial food and drug administration said in a statement.

Yum Brands Inc. (Guangdong) Co. Ltd., the parent company of Pizza Hut and KFC, said it has sealed 13,070 kilograms of suspicious meat supplies at its logistics center in Guangzhou.

The company has told all Pizza Hut outlets in Guangdong to seal meat supplies from Shanghai Husi.

Shanghai-based Dragon TV aired a news program on Sunday claiming that Shanghai Husi had supplied products tainted with reprocessed stale meat to a string of fast food chains and restaurants across China.

The expose is another blow to western fast food chains like McDonald's and KFC, which have been implicated in a number of food safety scandals involving suppliers over the years.

Shanghai authorities have vowed a thorough probe into the scandal.