Three of the accused have been identified and police teams are conducting raids at their hideouts in Delhi-NCR, a senior police official said.
Two police constables, who were deployed at a picket near the eatery, have been suspended for alleged inaction and a departmental inquiry has been initiated against them, the official said.
Vasudeo alias Pappu was allegedly shot at in his eatery around 10.15 PM on Monday in presence of several other customers, including two policemen who were not on duty. He died in the wee hours yesterday.
Being chased by the eatery staff, the accused fled from the spot taking advantage of darkness, as streetlights had stopped functioning in the area after the dust storm that evening, and dodging the two police officials deployed in a picket near the eatery.
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The images of the assailants could not be captured by any of the CCTV cameras in the neighbourhood, largely because of the darkness. However, they were identified with the help of the registration number of the car in which they had fled, police said.
Police then acquired a list from Uttar Pradesh Transport Department (as the car had a UP registration number) with details on the same and shortlisted the car, the official added.