According to police, the killers had lent money to Jain. On Thursday they asked him to return it.
'There was a quarrel after which Bhupendra was shot dead. We have identified the assailants and they will be arrested soon,' said Additional Deputy Commissioner of Police (east) Anyesh Rai.
In another incident, an accountant was critically injured by three motorcycle-borne men around 9 a.m. Friday in Bhogal area in south Delhi.
According to police, they tried to snatch a bag from the victim. When he resisted, they shot him before escaping with the bag.
Umesh, a courier company employee, was critically injured by motorcycle borne criminals in Mandawali area of east Delhi around 10 a.m. Friday. The assailants opened fire at him and escaped.