Dozens of men sat and lay together in small caves, some so shallow they couldn’t stand up. The air was wet and stuffy, and wracking coughs echoed in the confined space. Bodies wrapped in fabric and twine were set aside in rows nearby.

The clampdown on illegal mining cut off food and water to hundreds of miners underground. At least 78 bodies were pulled from a mining shaft this week, and more are believed to remain underground.

Illegal mining is common in parts of gold-rich South Africa. Typically, undocumented miners known as zama zamas - from an isiZulu expression for "taking a chance" - move into mines abandoned by commercial miners and seek to extract whatever is left. Some are under the control of violent criminal gangs.