Hardeep had four bullet injuries, but no bullets were found inside his body.
Ponty and Hardeep were killed when both sides allegedly opened fire at each other on Saturday at a farmhouse in south Delhi's Chhattarpur following a dispute over ownership of the property.
During the cremation, the police stopped the vehicle carrying the body at the gate and informed the family about conducting second autopsy.
The arguments between the family and the police led to the delay in the cremation. After a harrowing argument, the police officials spoke to the Delhi Sikh Gurudwara Prabhandak Committee president, Paramjeet Singh Sarna, who pacified the family.
A senior police official said that Ponty's body was handed over to his family after AIIMS conducted the post-mortem. However, the doctors who conducted the autopsy told investigators that three bullets were still lodged in his body. "The Law does not allow the body to be cremated where there is an ambiguity in the autopsy reports. After persuading the family, we have taken the body back to AIIMS for a re-post mortem," the official said.