Chinese regulators investigating Wal-Mart store

Chinese regulators are investigating a Wal-Mart in southern China for food safety violations.

The investigation came after videos showing Walmart employees at a location in Shenzhen using month-old oil to cook items like fried chicken.

The voiceover of the video was made by an anonymous person who claims to have worked for Wal-Mart for seven years.

The US retail giant has said it has launched its own investigation in response to the video and found no evidence to support the claims that have been made.

The authorities investigating the case have not yet reached any conclusions.