CHANGSHA - Four people were killed and one injured after workers from a food company in Central China's Hunan province fell into a sewage well Monday.

The accident occurred at about 11:35 am when a cleaner for the Aoquan food company fell into the sewage well in Xiangxiang city. Three workers attempting to help also fell into the well, while a fourth worker failed to pull them out.

According to the local publicity authorities, the four people died of poisoning. The worker who did not fall in was injured and sent to a local hospital.