Photo taken on July 27, 2010 shows the house destructed in mud-rock flow in Qiaoergou Village of Shanyang County, northwest China's Shaanxi Province. The rain-triggered mud-rock flow hit Qiaoergou Village on July 24, burying 29 people. As of Tuesday, six people were killed, five were seriously injured and 18 remained missing. About 530 villagers have been evacuated. (Xinhua/Chen Changqi)

Six people were killed and 18 remained missing after a mud-rock flow hit a mountain village in northwest China's Shaanxi Province last Saturday morning, local authorities said Tuesday.

The rain-triggered mud-rock flow hit Qiaoergou Village of Shangluo City's Shanyang County, burying about 30 people, an official with the county committee of the Communist Party of China confirmed with Xinhua.

Five people were seriously injured but were rescued. About 530 villagers were evacuated.

Rescuers have retrieved six bodies and the missing people were thought to have a slim chance of survival, the official said.