Desrbing their modus operandi, Deputy Commissioner of Police (East) Omvir Singh said the accused roamed around in groups on scooters and targeted solo drivers wearing gold jewellery.
After selecting the target, one of the scooter riders would start riding parallel to the targeted car and smile at the driver with folded hands, he said.
The driver would think that he knows the scooter rider and stop his car. By that time, another rider would come towards the other side of the car.
Since incidents occurred in trans-Yamuna area following which a team of the Jagatpuri Police Station was roped in for busting the gang.
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On May 19, the police received information that the gang members would be going towards Madhu Vihar through Jagatpuri.
A trap was laid and around 1.50 AM on May 20, three scooters were spotted in the area. After a brief exchange of fire, the four accused were arrested.
The third group fled from the spot.