Mohammad Farukh, 36, Salma, 48, and her son Ujjal, 27 -- all residents of Madaripur in Bangladesh -- were taken into custody on Wednesday from Geeta Colony in east Delhi. A hunt is on to arrest Tultul, the gang leader.
Explaining their modus operandi, Deputy Commissioner of Police Rishipal said the gang would approach potential victims with a US dollar.
They operated mostly in malls and other places, targeting the rich and literate looking persons. They had on Monday robbed Kanahiya Sharma, a resident of Noida, of Rs 80,000. They met him at a mall.
Rishipal said the gang would pose as illiterates to gain the victim's confidence.
They would show him a dollar note and ask: "Sir, can you please tell me what this is? We found it on the ground... Is this of any value?"
"They would then say they have around 6,000 more such dollars," said the officer.
If the victim fell for their ruse, they would negotiate a "deal" to sell him or her all the dollars in exchange for a meagre amount of Indian currency.
The accused would plead that they were in dire need of money.
"Some victims agreed to buy the 6,000 dollar bills," the officer said.
"The gang would then woo the victim to an isolated place to exchange the currency. Instead, they would rob the victims, taking away their money and valuables at gun or knife point, and flee."
