Authorities launched the highest level of disaster response. Relatives of the missing and those suffering losses in the disaster will be given appropriate care, Xi said.

The landslide occurred at 6 a.m. Saturday in Xinmo village in Mao County, Aba Prefecture, CCTV said.

A smaller second landslide caused huge rocks to fall onto the village, which made it more difficult for heavy machinery to get to the scene, police team leader Wang Yongbo told CCTV.

'My heart feels uncomfortable'

A family of three emerged alive from the rubble Saturday, the Mao County government said on its official Weibo page. The couple and their baby were being treated at the Mao County People's Hospital, the post said.

Qiao Dashuai, whose infant is 1 month old, said he heard a loud sound and tried to close the door to his house against the wind, he told CCTV.

"I ran outside and felt this strong wind and saw water rushing towards us," he said. "A rock fell into our living room. We slowly crawled out while holding our baby and escaped. People from a neighboring village gave the baby a bath, and looked for clothes for us and the baby. As we went to the crossroads, we saw an ambulance. The ambulance sent us to Mao County (Hospital)."

"Now we just have external wounds, and there aren't any major problems. But my heart feels uncomfortable," he said.

The landslide happened at a high part of a mountain and fell onto the village, blocking a 2-kilometer (1.25-mile) section of a river, Xinhua reported.

Landslide's cause under review

Landslides' causes are complicated and could include rain and unstable rock masses, an official from China's Ministry of Land and Resources told CCTV.

"In this landslide, we feel that it is also because the whole mountain structure in Sichuan has become loosened following the earthquake on May 12, 2008. There is a drop in the 'dynamic properties,' and its stability has also decreased. The recent rainfall has triggered the landslide," Tian Yanshan said.

"Earthquakes, mining activities -- many man-made and natural activities can possibly trigger landslides. When the stability of the mountain structure has reached its maximum, any triggering factor could lead to landslides," Tian said.

UN condolences

UN Secretary-General António Guterres issued a statement through his spokesperson saying he is saddened about the deaths and devastation from the landslide.

"The secretary-general salutes the efforts of the national relief and recovery teams. The United Nations stands ready to support the authorities in any way it can if needed," the statement reads.

"The secretary-general extends his condolences to the people and government of the People's Republic of China and wishes those injured a speedy recovery."