Rescue teams in South Africa have stepped up efforts to pull out survivors and the corpses of illegal miners trapped underground for about two months, following one of the most extraordinary tragedies to hit the industry.

South African rescuers have so far pulled 78 bodies and rescued 166 people from the Stilfontein gold mine over three days of operations, police spokesperson Athlenda Mathe told reporters at the scene on Wednesday.

The South African government has launched a rescue operation at an abandoned gold mine in the country’s North West province, where at least 109 men have died, a group representing the miners said, after local authorities cut off vital supplies in a dramatic bid to crack down on the country’s illegal mining trade.