Police on Wednesday recovered from Haryana the car used by the killers of local Bahujan Samaj Party leader Deepak Bhardwaj in his farmhouse here and picked up four men who are suspected to have provided illegal arms to the assailants.

Twelve people were also questioned in connection with the murder of the 62-year-old politician. Police were investigating whether any contract killer from Haryana’s Sonepat is involved.

The assailants of Mr. Bhardwaj, who was into education, hotel and real estate business, had come in a dark grey Skoda car to the farmhouse The Skoda is suspected to have borne a fake registration number.

Police sources said the assailants abandoned the Skoda and escaped in a different car.

A senior police official said they were talking to Mr. Bhardwaj’s wife, who was staying separately, and his sons to ascertain about a property dispute and whether he had any enemies.Police had on Tuesday released the CCTV footage of the attackers at the Nitesh Kunj farmhouse where the incident took place. Investigators suspect the attackers were from Sonepat, going by the way in which the operation was carried out.

Mr. Bhardwaj, the richest candidate in the 2009 Lok Sabha polls with declared assets of over Rs. 600 crore, was fired upon from point blank range by three men.

The trio entered his farmhouse in Rajokri at 8.55 a.m. on the pretext of booking the place for a marriage, Delhi Police Commissioner Neeraj Kumar told reporters here.

He had suffered bullet injuries on his chest and back and slumped bleeding heavily.

He was rushed to Army’s Research and Referral Hospital near Dhaula Kuan in south Delhi, where he succumbed to his injuries.Ajay Chaudhary, Additional Commissioner of Police said the case will be solved soon.

Mr. Bhardwaj’s post mortem was conducted on Wednesday and two bullets were removed from his chest and head.