Just weeks after launching an advertising campaign focused on food and quality safety in China, McDonalds is under fire for local food safety violations.

State-run China Central Television accused the company of selling chicken wings more than an hour and a half after they were cooked, which is about an hour past the company’s self-imposed rule. The report also said that workers prepared and served beef that had fallen on the floor.

The investigation was launched to mark World Consumer Rights Day on Wednesday.

“McDonald’s China attaches great importance to this,” the company responded on its website. “We will immediately investigate this isolated incident, resolutely deal with it earnestly and take concrete actions to apologize to consumers.”

The accusations could hurt consumer confidence in the company’s food, which has a broad reputation in China for being high quality and safe — especially against the backdrop of several years of food safety scandals.

The state media report also raises more questions about whether Chinese officials scrutinize foreign companies much more than they do local ones.

Chinese authorities fined retailer giant Walmart and ordered 13 stores closed for two weeks last year after finding that the company had been passing off regular pork as organic, which costs consumers more.

The report Wednesday also alleged that Carrefour, a Fernch retail chain, had been selling chicken past the expiration date and marking up conventional chicken as “free-range” to charge more for it.