Rescue attempt continues to reach men 90 metres underground at Gleision colliery, near Swansea Rescuers remained optimistic late on Thursday night that four miners trapped 90 metres underground in a flooded Welsh colliery could be saved. The incident began on Thursday morning, when water gushed into the Gleision colliery, near Swansea, possibly after the men accidentally broke through into an old flooded shaft. Seven men, including a father and son, were in the drift mine when the accident occurred. Three – among them the son – managed to escape and raise the alarm. The father was left inside. Dozens of rescuers joined the effort to pump water out of the mine so they could reach the men, who were believed to be located 250 metres along a horizontal tunnel cut into the hillside. As families gathered in a nearby village hall to wait for news, the shadow Welsh secretary and local MP, Peter Hain, said the situation was