China's domestic security chief has labelled the incident at a morning market in Urumqi an act of "violent terrorism".
In recent months China has blamed a string of violent attacks on militant separatists from Xinjiang province.
More top news
Facebook has completed its first test of a solar-powered drone that carries internet signal in the skies above the UK.
Russia goalkeeper Igor Akinfeev has thanks fans for their support after he was struck by a flare thrown during a qualifier in Montenegro.
Astronauts arriving for their new mission hug the crew on arrival at the International Space Station.