At least 12 people were injured and hundreds of houses damaged when a moderate earthquake struck southwestern China on Sunday. The earthquake, measuring 4.0 on the Richter scale, shook Ningnan county, Sichuan province, and neighbouring Qiaojia county of Yunnan Province, local authorities said. "The earthquake left at least 11 people injured and damaged 300 to 400 houses in Qiaojia County," said Fang Zonghui, head of the county, state run Xinhua news agency reported. Nobody was reported dead or missing. The epicentre of the quake was located at 27.1 degrees north latitude and 102.9 degrees longitude, according to Sichuan's earthquake network centre. In April this year, over 2800 people were killed and thousands injured in a massive earthquake in China's southern Qinghai province.