The toll in a coal mine gas blast on Wednesday in the central Chinese province of Shaanxi rose to 23 after rescuers on Friday recovered 20 bodies, officials said.
The accident occurred on Wednesday evening in a shaft at the mine when 36 colliers were in the pit. Seven were able to run to safety, said a spokesman of the provincial government.
A search team was digging into the ruble for six trapped miners, officials said.
A rescuer said the mine was closed for repairs on Oct 3, when a separate pit was flooded.
"Drainage and repair work was still going on when the explosion occurred on Wednesday," he said on the condition of anonymity.