Urumqi, China - Police regularly patrol the streets of almost every significant town in China's troubled Xinjiang province. China's far west remains among its most unstable regions, with frequent clashes between ethnic Uighurs and the government, which is dominated by Han Chinese. The most recent incident occurred in the town of Serikbuya in Bachu County. "On the 16th of November, at around five o'clock, nine people attacked the police station and killed two auxiliary officers and injured another two police officers," Zhang Zeqiang, the head of the Kashgar government's media and propaganda office, told Al Jazeera. All the attackers were killed, he said, and the situation in the town is now "under control". Many residents of Xinjiang province have gotten used to the sporadic fighting, especially after a wave of ethnic violence in 2009 left almost 200 people dead and more than 1,500 injured.