Riots leave many dead in China
Violence in China's restive western region of Xinjiang has left at least 156 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 says the violence is some of the worst reported in the country since Tiananmen Square in 1989.
Eyewitnesses said the violence started on Sunday in Urumqi after a protest of a few hundred people grew to more than 1,000.
Xinhua says the protesters carried knives, bricks and batons, smashed cars and stores, and fought with security forces.
Wu Nong, news director for the Xinjiang government, said more than 260 vehicles were attacked and more than 200 shops and houses damaged.
Most of the violence is reported to have taken place in the city centre, around Renmin (People's) Square, Jiefang and Xinhua South Roads and the Bazaar.
The police presence was reported to be heavy on Monday.
Adam Grode, an American studying in Urumqi, told Associated Press: "There are soldiers everywhere, police are at all the corners. Traffic has completely stopped."