The accused were inspired by the Akshay Kumar-starrer heist film 'Special 26' and had taken the idea of impersonating as CBI officers from it, they said.
On July 26, seven people, suspected to be members of Neeraj Bawania gang, had gone to the jeweller's house. One of them entered the house wearing khakhi uniform on the pretext of a CBI raid, the police said.
When an elderly woman opened the door, all the accused barged inside the house, overpowered the family members, held them at gunpoint and began searching for valuables, they said.
A team was constituted under Deputy Commissioner of Police (Crime) G Ramgopal Naik to solve the case.
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Following a tip-off, three of the accused, Narender Vesnav (30), Madan (28) and Neeraj (38) were nabbed near St Xavier School, Shahbad Dairy here when they had come to meet someone, the police said.
During interrogation it was revealed that Vesnav had entered the house posing as a CBI officer. Their accomplices are still at large, they said.
He used to visit Koocha Mahajani, Chandni Chowk, to buy ornaments where he learnt about one of the jewellers in the market and conveyed the information to other gang members following which a plan was hatched to carry out the dacoity, they said.
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