Chinese state television said the violent knife attack in a train station in Kunming, China, was the result of "violent terror attack."
Pictures being shared on social media show bodies covered in blood lying around the ground at the station.
There has been no immediate word on who is responsible. State television said Communist Party Officials were on their way to the scene.
More top news
Speaking to ITV News' Mark Austin on the anniversary of the London bombings, ex-PM says nations around the world will need to respond.
A Canadian man has been arrested after tying more than 100 balloons to a garden chair and flying over the city of Calgary.
A van bearing the faces of some of Britain's most wanted fugitives will be driven around parts of Spain popular with expats in a new push.