Sgt Puleng Motsoeneng said the body was found on Saturday by a passerby walking near Tshepong mine.
“When he saw traces of blood, he became curious and followed the blood traces.
“To his dismay he made the gruesome discovery and found a teenage boy lying in a pool of his own blood, still in his school uniform.”
She said the principal of JC Motume High School identified him as Lerato Samuel Nyama.
No arrests have been made.