According to the police, the victim has been identified as Fazlu Rehman, a native of UP and resident of Govindpuri who was shot dead in Amar Colony area.
Police said that the incident took place around 1045 p.m. on Friday when he was returning from his sister's house in Kalindi Kunj after a dinner hosted by her.
Family members of the victim stated that his six-year-old son and relative Yameen were on a scooty and had stopped at a market.
"He was talking on the phone and had asked Yameen to go to the shop while his son waited. All of a sudden, two men wearing helmets came and fired on Fazlu and fled," said his relative.
Police said that the victim was rushed to the hospital where he was declared brought dead. The body was shifted to AIIMS mortuary where the post-mortem was conducted and the body was handed over to the family.
Police said they have registered a case under section 302 (murder) of the Indian Penal Code and begun a probe.
"It appears to be a case of personal enmity but it is being investigated from all angles," said Deputy Commissioner of Police (South East) Chinmoy Biswal.