From the Beebs...
Its been fairly apparent for a while now that the "benevolent dictatorship" of the Chinese state has only been sustainable as long as there was continued economic growth, and with the global downturn it was only a matter of time before the sparks hit the tinder.Violence in China's restive western region of Xinjiang has left at least 140 people dead and more than 800 people injured, state media say.
Several hundred people were arrested after a protest, in the city of Urumqi on Sunday, turned violent.
Beijing says Uighurs went on the rampage but one exiled Uighur leader says police fired on students.
The protest was reportedly prompted by a deadly fight between Uighurs and Han Chinese in southern China last month.
The BBC's Chris Hogg in Shanghai says this is one of the most serious clashes between the authorities and demonstrators in China since Tiananmen Square in 1989.
Will the People's Republic survive another ten years in its current configuration?