Jierla Yishamuding, mayor of the Urumqi City, speaks during a government press conference on the riot that killed 156 people and injured more than 1,000 Sunday in Urumqi, capital of northwest China's Xinjiang Uygur Autonomous Region, on July 7, 2009. [Xinhua]

A foreign journalist raises his hand during a government press conference on the riot that killed 156 people and injured more than 1,000 Sunday in Urumqi, capital of northwest China's Xinjiang Uygur Autonomous Region, on July 7, 2009. [Xinhua]