Kolkata: A Salt Lake FD block resident, Deepak Chowdhury, was arrested on Monday for allegedly duping a CA block resident of Rs 15.4 lakh under the pretext of investing in a fraudulent fixed deposit scheme of the Indian Post Office. Acting on a complaint filed last month, cops nabbed Chowdhury from his home. Police said he reportedly handed over forged policy bonds bearing fake seals and signatures of a senior official at a post office in Kakurgachhi. tnn