Delhi Police on Wednesday said that at least a dozen people have been questioned in connection with Tuesday's murder of former politician and prominent businessman Deepak Bharadwaj.
Senior Delhi Police officials said that apart from the twelve, they were also questioned Bharadwaj's wife, who stays separately, and his sons, in connection with the case.
They said that they were probing the possibility of contract killers being hired from Sonepat, Haryana, to eliminate Bharadwaj, said to be the richest politician to have contested the 2009 general elections on a BSP ticket.
There is a view that a property dispute could also have been one the factors responsible for his murder at his farmhouse on Tuesday morning.
Earlier, Delhi Police claimed to have located the car that was used by two persons to escape after killing Bhardwaj at his farmhouse in the city's Nitesh Kunj area.
The Skoda car was picked up from Jind, Haryana late Tuesday night.
Police have also identified the three shooters, saying they belong to Khera village in the Pooth Khurd area of northwest Delhi which is near the Delhi-Haryana border.
Several teams of the Special Task Force (STF) are reportedly conducting raids in different places to nab them.
Police said that they have got vital clues in the case along with the addresses of the assailants and are on the lookout for them. Delhi Police is being assisted by their Haryana counterparts in the case.
The breakthrough has strengthened the suspicion that a massive land deal with a rival builder could be the motive of Bhardwaj"s murder. However, the cops have not yet ruled out the involvement of a close family member.
The teams are conducting raids in Haryana, Uttarakhand and Uttaranchal.
Deepak Bhardwaj, 62, suffered two bullet injuries in his head and chest and was declared dead at the Army Research and Referral Hospital. (ANI)