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
Tonight will start off clear in many areas, but cloud will increase from the east overnight, bringing some light and patchy rain.
Defending champions Arsenal squeezed into the FA Cup final despite a spirited fightback from Reading, who forced extra-time
A detective who led investigations into the Valley Parade fire tells ITV News there is "unequivocal" evidence the disaster was an accident.