Attack on Chinese market kills 31

Attackers in China's restive Xinjiang region have crashed two cars into shoppers at a market, killing 31 people, Chinese media reports say.
They also threw explosives during the attack in the regional capital Urumqi. More than 90 people were injured, the state-run Xinhua news agency said.
The Ministry of Public Security called it a "violent terrorist incident".
Xinjiang, which is home to the Muslim Uighur minority, has seen a spate of attacks in the past year.
Information about incidents in the region, where ethnic tensions between Uighurs and Han Chinese continue, is tightly controlled, according to BBC.