All the 12 missing people have been confirmed dead in an explosion earlier this month at a factory in the eastern China, said local authorities.
The explosion occurred on November 8 in a workshop at Dongfeng Mechanical and Electric Science Co in Shucheng County of Anhui province.
There were 15 people working in the workshop at the time of the incident. Three people have been hospitalised.
The 12 fatalities have been pulled from the wreckage over the past fortnight, state-run Xinhua news agency reported.