Fourteen workers who got trapped in a coal mine located in southwest China that collapsed 10 days ago have died, according to reports published on Sunday in Chinese media.

The rescue mission was completed at midday on Sunday when the corpses of the miners were recovered, according to the state-run Xinhua News Agency.

Several miners were trapped when a shaft’s roof at the Sanhe Shunxun mine in the province of Guizhou collapsed on February 25, trapping them within.

According to reports in the media, the rescue attempt was difficult since the ceiling caved in roughly 3 km (1.9 miles) from the mine’s entrance and the collapsed area was quite big.

Further inquiry into the circumstances surrounding the event is now ongoing.

China coal mines are among the deadliest in the world, with explosions and gas leaks occurring on a daily basis despite repeated safety precautions.