Pakistan, Aug. 10 -- Important new evidence has emerged in the investigation into young trader Mir Raza's death, with investigators reportedly finding acid traces in his stomach. Police have also detained 21 people as authorities expand their inquiry.

Investigators reportedly found severe acid-related damage to Mir Raza's lungs during the examination, while further signs of acid exposure were found on his hands and feet. The findings have raised fresh questions about the circumstances surrounding his death.

Sources said investigators also detected acid traces and another person's sweat on Mir Raza's shirt, adding another possible clue to the case. Police are examining these findings alongside other evidence to determine what happened be...