An earthquake in southwest China's Yunnan province struck early Sunday, leaving at least three people dead and hundreds injured, the AP reported. Some 120,000 residents were evacuated because of the quake, which measured 6.4 on the Richter scale. The quake struck the county seat of Ning'er at around 5:30am. Earthquakes are common in the mountainous region, which lies about 144km north of the Laosian border. Tremors could be felt as far as 297km away.