Usman Muhammad, an artisanal miner in his 20s, was among more than 50 prisoners locked in the cell with only a small high window for ventilation. He told the BBC he has never felt heat like it: "When we touched each other's bodies, it felt like fire burning." Humidity levels above 90 percent prevented natural cooling, and temperatures outside exceeded 25°C.
Muhammad said that when one inmate fainted, prisoners knocked on the door for help. A guard looked at the unconscious man and closed the door. "That's how they started dying one after the other," he said.
Thirty-three died in the cell and four more died later in hospital. The mass deaths triggered an outcry and protests, including attacks on public buildings, as relatives and locals demanded answers. Federal officials initially attributed the deaths to a diphtheria outbreak, but an investigation is now under way to determine what exactly happened.