Rescuers were searching for at least 91 missing people on Monday, a day after a mountain of excavated soil and construction waste buried dozens of buildings when it swept through an industrial park in the southern Chinese city of Shenzhen.

The landslide buried or damaged 33 buildings in the industrial park in Shenzhen, according to China's official Xinhua News Agency. Aerial photos from the Public Security Ministry's Firefighting Bureau showed the area awash in a sea of red mud, with several buildings either knocked on their side or collapsed entirely. Mud had thoroughly infused many of the buildings, posts on the bureau's site stated, leaving the "room of survival extremely small." No deaths have yet been reported.

Seven people were rescued overnight and 13 were hospitalized, including three with life-threatening injuries, according to state broadcaster China Central Television (CCTV), which cited rescue leaders. Persistent rain fell in the area on Monday, although it wasn't clear whether that was hampering rescue efforts.