The bullet-riddled body of Jagat Singh, who was formerly associated with a political party, was found at his Nekpur farmhouse last morning.
On the basis of initial probe, investigating officer Ranvir Singh said that Jagat was murdered because of a family dispute over some property.
The victim's nephew, Ajay Dagar, had filed a complaint in this regard, based on which sector-55 police station booked the six men today.
In an unrelated case one Lakhan, who hails from Madhya Pradesh, allegedly cajoled and take away with him a 14-year-old girl, who is from here, according to a police complaint filed by the girl's mother.