The robbers arrived at Mukesh Agrawal's house in a car and introduced themselves as Income Tax department officials, Udhamsingh Nagar SSP Senthil Abudai Krishna Raj S said.
When Agrawal's younger brother asked them to produce their ID cards, they got angry and pulled out their knives and guns, he said.
They then ransacked the house for nearly an hour, keeping the inmates captures at gunpoint and left with Rs 8 lakh in cash and jewellery worth Rs 22 lakh, the SSP said.
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