Two people were killed, one went missing and another one was injured when a bridge under construction collapsed in Xinhui district of Jiangmen city, Guangdong province, a statement released by the local Xinhui district government said.
The statement released Monday said the injured person was sent to the hospital for treatment.
The search and rescue of the missing worker is still ongoing as of noon Monday.
The missing surnamed Xu, 56, comes from Changsha in central China's Hunan province.
Jiangmen and Xinhui have set up special task forces to help with search and rescue work, conduct accident investigations and remove hidden dangers, it said.
The tragedy occurred at about 4 pm on Saturday when a section of the Tanjiang Bridge collapsed.
The construction project was immediately suspended and an investigation of the cause of the accident was quickly launched, the statement said.
An official from the Xinhui district bureau of transportation refused to comment on the case, saying it was still being investigated.
The Tanjiang Bridge is part of the national highway G240, which links Jiangmen in the western part of the Guangdong-Hong Kong-Macao Greater Bay Area to other parts of the mainland.