"All 43 bodies have been recovered," said Iftikhar Ahmed, chief inspector of mines.

"There are no survivors and the mine is being sealed," Ahmed said.

The mine in the far-flung Sorange district of Quetta was poorly ventilated, allowing poisonous gases to accumulate and trigger blasts that led to a collapse on Sunday.

The mine is run by the state-owned Pakistan Mineral Development Corporation and officials said they will launch an investigation into why the warnings to stop mining were not heeded.