LUCKNOW, Jan. 21 -- A man who once guarded an ATM kiosk on the campus of a state university was suspected to be a key facilitator in a fixed deposit fraud, the scale of which could be a few crores of rupees.

The former security guard, identified as Dilip Kumar, was detained on Tuesday. A day ago, a bank mitra (banking correspondent) and his aide were arrested for allegedly embezzling funds worth lakhs of rupees by issuing forged FD receipts to customers at a private bank's branch on the Dr Shakuntala Mishra National Rehabilitation University situated on Mohaan Road.

Another major focus of the probe is a lavish house, which is said to be worth around Rs.1.5 crore, suspected to be owned by the bank mitra in Rajajipuram's Saripura area. "W...