Police shot dead four attackers and arrested one after knife-wielding "terrorists" launched an attack at a crowded train station in Kunming, China's Yunnan province.
State news agency Xinhua reported that about five others were on the run, after one of the worst attacks of its kind in China in recent memory.
"This brutal attack on defenceless, innocent people by violent terrorists devoid of conscience exposes their inhuman and anti-social nature," Xinhua quoted security chief Meng Jianzhu as saying.
"They inevitably will face the severe punishment of the law. We must mobilize all resources and adopt all means to break this case," Meng said, echoing comments made by Chinese President Xi Jinping.
More top news
Authorities say Ai Weiwei failed to disclose a previous "criminal conviction" - though his supporters say he was never even charged.
The supermarket made the change after getting feedback from customers who said they felt under pressure as they finished their shop.
Harry Potter fans have been left sorely disappointed after the slightly misleading hashtag #NewHarryPotterBooks began trending on Twitter.