The death toll from landslides in China, which has been experiencing extreme weather in recent weeks, has doubled overnight.

Chinese officials say at least 702 people were killed after a mass of mud and rock rushed through a town in remote Gansu province at the weekend.

More than 1,000 people are still missing, as thousands of soldiers and volunteers continue to dig round-the-clock to try to find survivors.

One 52-year old man was pulled out alive on Tuesday, but rescue efforts are now being threatened with forecasts of more rain in the coming days.

Al Jazeera's Melissa Chan reports from Zhouqu in Gansu province. (Aug 11, 2010)