Ethnic Uighurs attacked police with knives and bombs at a traffic checkpoint in China's far western Xinjiang region, Radio Free Asia reported on Wednesday, and at least 18 people were killed. The attack occurred at the beginning of the Muslim fasting month of Ramadan on Monday in the southern city of Kashgar, where tensions between Muslim Uighurs that call the region home and the majority Han Chinese have led to bloodshed in recent years. Hundreds have been killed in violence across the region, blamed by Beijing on Islamist militants. Suspects killed several police officers with knives and bombs after speeding through a traffic checkpoint in a car in Kashgar's Tahtakoruk district, U.S.-based Radio Free Asia said, citing Turghun Memet, an officer at a nearby police station. @amoy, freedom fighters at work.