On August 28, the accused persons had robbed a bag containing Rs 3.18 lakh cash at gunpoint from an employee of a milk distributor in west Delhi's Vikaspuri while he was going to deposit the amount in a bank.
The accused, belonging to the Rajneesh gang which is notorious for gunpoint robberies, had purchased home appliances with the robbed cash and also deposited a part of the amount in a bank.
Five country-made pistols, eight live cartridges, two stolen laptops, five mobile phones, a motorcycle and gold ornaments were seized from their possession, said the officer.
Two more gang members - Sidharth Sharma and Gaurav -- both aged 20, were arrested on the morning of September 2.
Sharma is a national-level Taekwondo player, the police said.