Rescuers were searching today for at least 91 missing people a day after a mountain of excavated soil and construction waste buried dozens of buildings when it collapsed and swept through an industrial park in the southern Chinese city of Shenzhen.
China's official Xinhua News Agency said the landslide on Sunday buried or damaged 33 buildings in the industrial park in Shenzhen, a major manufacturing centre in Guangdong province across the border from Hong Kong that makes products used around the world ranging from cellphones to cars.
Aerial photos on the microblog of the Public Security Ministry's Firefighting Bureau showed the area covered in a sea of red mud, with several buildings either knocked on their side or collapsed entirely.
Posts on the microblog said mud had thoroughly infused many of the buildings, leaving the ''room of survival extremely small''.
Cellphone camera video of the noontime disaster run by state broadcaster China Central Television, or CCTV, showed the massive wall of debris slamming into the buildings and sending up huge plumes of dust.
Details are beginning to emerge about the cause of the landslide that authorities now say covered an area of 100,000 square metres with up to 6 metres (20 feet) of mud.
The ministry of land and resources said the debris originated with a steep, man-made mountain of dirt, cement chunks and other construction waste that had been piled up against a 100-metre-high hill over the past two years.
''The pile was too big, the pile was too steep, leading to instability and collapse,'' the ministry said, adding that the original, natural hill remained intact.
The ministry said it had dispatched additional personnel to help monitor the situation and guard against a second collapse.
The 33 damaged or collapsed buildings included 14 factories, two office buildings, one cafeteria, three dormitories and 13 sheds or workshops, Shenzhen Deputy Mayor Liu Qingsheng said at a news conference.
Nearly 1,500 people were involved in rescue efforts, aided by 151 cranes, backhoes and other construction equipment.
CCTV said Chinese President Xi Jinping and Premier Li Keqiang issued orders to make rescuing those trapped the top priority.
The initial landslide sparked an explosion in a section of a natural gas pipeline owned by China's top oil and gas producer, PetroChina. By this morning, the fire was extinguished and a temporary section of pipe was being laid.
Xinhua said that as of this morning, 59 men and 32 women were missing in the landslide. No deaths were reported yet.
Li Yikang, the deputy secretary general of the Shenzhen city government, said at a televised news conference that more than 900 people had been evacuated.
Ren Jiguang, the deputy chief of Shenzhen's public security bureau, told CCTV that most people had been moved to safety before the landslide hit.
State media carried photos of what looked like at least one five-storey building leaning over and partly crumpled in the industrial park, and a sea of brown soil covering a vast area around it.
The landslide is the fourth major disaster to strike China this year following a deadly New Year's Day stampede in Shanghai, the capsizing of a cruise ship in the Yangtze River and a massive explosion at a chemicals warehouse in Tianjian on the coast near Beijing.