Rescuers work at the accident site where a road cave-in occurred in Huamao Industrial Park in Shenzhen, south China's Guangdong Province, May 21, 2013. The accident occurred around 9:19 p.m. (1319 GMT) on May 20. As of 4:30 p.m. (0830 GMT) Tuesday, five bodies had been retrieved from a pit measuring three to four meters deep. Search and rescue efforts are under way. (Xinhua)

Rescuers work at the accident site where a road cave-in occurred in Huamao Industrial Park in Shenzhen, south China's Guangdong Province, May 21, 2013. The accident occurred around 9:19 p.m. (1319 GMT) on May 20. As of 4:30 p.m. (0830 GMT) Tuesday, 5 people were killed and another one injured as the cave-in led to a pit measuring three to four meters deep. Search and rescue efforts are under way. (Xinhua/Liang Xu)

Rescuers work at the accident site where a road cave-in occurred in Huamao Industrial Park in Shenzhen, south China's Guangdong Province, May 21, 2013. The accident occurred around 9:19 p.m. (1319 GMT) on May 20. As of 4:30 p.m. (0830 GMT) Tuesday, 5 people were killed and another one injured as the cave-in led to a pit measuring three to four meters deep. Search and rescue efforts are under way. (Xinhua/Liang Xu)