Rescuers found the bodies of two victims in the shaft today, according to the local rescue headquarters.
The mine in Xihu district, Benxi city caught fire at around 3 AM on Monday, trapping 13 miners about 500 meters underground, state-run Xinhua news agency reported.
Hao Chijun, head of the city's work safety bureau, said the colliery was shut down in 2004, but its owner secretly continued operations by building a coal washing plant and hiding the shaft within it.
Initial investigations showed the fire was caused by a compressor about 400 meters underground in the shaft.
The government has worked to eliminate this type of machine as they easily catch fire.
The owner, Jiang Shuhua, delayed reporting the fire, so rescuers arrived at least eight hours late than they should have. Jiang was arrested by the police.